It was a dark November day in 1895. In a laboratory at the royal University of Wurzburg, in western Germany, a 50-year-old physics professor, Wilhelm Roentgen, performed what looked like a type of mag 题目和参考答案——青夏教育精英家教网—

题目内容

It was a dark November day in 1895. In a laboratory at the royal University of Wurzburg, in western Germany, a 50-year-old physics professor, Wilhelm Roentgen, performed what looked like a type of magic. He placed a glass vacuum（真空）tube inside a black cardboard box and applied a high-voltage current（高压电流）. He suddenly noticed that, on a bench nearby, a piece of paper coated with a chemical substance began giving off an strange light. Over the following two weeks, Roentgen performed a series of experiments that proved the existence of a form of electro-magnetic（电磁的）radiation he called X-rays.

His astonishing discovery has led to a deeper understanding of the physical world----in particular, to the field of medical diagnosis（诊断）.

X-rays are widely used in medicine to make radiographs or X-rays pictures of the bones and internal organs of the body to see whether diseases exist, such as broken bones or lung diseases.

A radiograph is made by passing an X-rays beam through a patient’s body onto a piece of photographic film. The bones takes in more of the rays than do muscles or other organs, so the bones throw the sharpest shadows on the film.

Improvements over the past century----from fluoroscopy（荧光透视法）to CT scans---- have made X-rays technology an invaluable tool of medicine.

78. At the beginning of the passage, Prof. Wilhelm Roentgen was _______.

A. performing an entertaining program B. playing magic

C. doing some experiments D. None of above

79. When Prof. Roentgen placed a glass vacuum tube in a black box and applied a high-voltage current, he _______.

A. saw a bench nearby

B. noticed a piece of paper on a nearby bench begin to burn slowly

C. noticed a piece of paper on a nearby bench begin to give out strange light

D. noticed a piece of paper was coated with a chemical substance

80. The bones have clearer shadow on the photographic film than do muscles or other organs, because ______.

A. the bones are harder than them

B. the bones can help absorb more rays than them

C. the bones can block more rays than them

D. X-rays cannot pass through the bones

CCB

练习册系列答案

68所名校图书小升初高分夺冠真卷系列答案

伴你成长周周练月月测系列答案

小升初金卷导练系列答案

相关题目

第二节：完形填空（共20小题；每小题1 分，满分20分）
阅读下面短文，掌握其大意，然后从36—55各题所给的A、B、C、D四个选项中，选出最佳选项。
Nancy was getting ready for bed when she heard a cry. A little 36 , she went over to the window and   37 . A homeless girl who seemed to be about her age was 38   in front of her house. She felt 39   for the girl, because it was a cold winter, and the girl had nothing to keep her 40 .
Nancy was suddenly struck with a great 41 . She ran to her mother’s closet(壁橱), and   42   up an old quilt（被子）. She had to walk 43   down to the front door so as not to trip（绊倒）over the quilt which was hanging   44 , but she finally made it. Dropping the quilt, she opened the door. Standing there was the homeless girl, looking quite 45 . Nancy smiled warmly and 46   the quilt to the girl. Her smile grew wider as she saw the true 47   on the girl’s face.
The next day a   48   came to the door. Nancy flew to the door hoping that it was the little girl again. She opened the door and looked outside. It was the little girl. The girl smiled,“I   49   you want this back.”
Nancy opened her mouth and was about to say that she could keep it   50   another idea appeared in her head.“Yes, I want it back.”
The homeless girl’s face 51 . This was obviously not the   52 she had hoped for. She slowly put down the quilt, and turned to   53   when Nancy said,“ 54 ! Stay right there.” She ran upstairs and came back with a   55   quit. “Have this,”she said quietly. It was Nancy’s own quilt made of silk and feathers.
36. A.excited                   B.frightened             C.intersted                    D.nervous
37. A.cleaned up              B.sat down                   C.looked out             D.closed up
38. A.fighting                     B.shouting                    C.singing                  D.crying
39. A.pity                               B.regret                    C.fun                           D.ashamed
40. A.rich                               B.safe                          C.healthy                  D.warm
41. A.suggestion               B.idea                          C.hit                               D.trick
42. A.looked                   B.caught                   C.picked                   D.brought
43. A.slower                    B.farther                  C.earlier                   D.sooner
44. A.on                          B.in                         C.over                          D.down
45. A.tired                           B.hungry                  C.rude                          D.puzzled
46. A.lent                               B.lifted                        C.handed                  D.threw
47. A.weakness                    B.happiness              C.friendship              D.curiosity
48. A.knock                     B. friend                  C.stranger                     D.girl
49. A.believe                   B.wish                         C.suppose                     D.know
50. A.after                           B.until                         C.when                        D.before
51. A.fell                         B.lost                           C.glared                   D.saved
52. A.quilt                           B.topic                         C.gift                           D.answer
53. A.enter                          B.leave                         C.speak                    D.thank
54. A.Help                           B.Wait                         C.Stop                         D.Listen
55. A.cheap                     B.big                           C.new                          D.clean

Martin was grown-up, and for his birthday that year his father gave him a   36  without any pictures in it!
Martin’s father found he was not   37  about it, and told him, “Son, this isn’t just any   38  book; it’s a magic (有魔力的) book. But to discover its magic you’ll have to   39  it.”
Well, that was better. Martin liked   40  to do with magic. He started reading it, 41  he wasn’t very willing to.
The next morning, his   42  asked him, “Have you found the magic   43 ? ”
So… there was a key to find! Martin flicked through (快速翻阅) the book, but there was no   44  of the key.
And then his father   45  him, “You won’t find it like that . You have to read the book.”
Martin didn’t have much patience (耐心), thinking his father just told a   46  . A little later, his little sister, Angela, asked him   47  the book. After several days, she   48  shouted, “I’ve found the key!” And she wouldn’t stop   49  all the places she had visited using the magic key.
This made Martin read the book again. At first it was a   50 ; there wasn’t even one single   51  in the book. But, gradually, Martin became   52  the adventurous (冒险的) prince’s life. Then, suddenly, he was there.
The book   53   was the key!
It was true that every time he   54  it, he felt going to its valleys and seas, and he lived the adventures of the prince.
From then on, with every new book, Martin never   55  being attracted by the letters and words inside.

As a music teacher，I have always known that music touches the soul. It can 36 all kinds of barriers to reach students in a very special way.It can be the 37 for each child to find their light.I would like to 38 a story about it.
For a few years I was 39 with the opportunity to teach disabled students.One of my most 40 students was a five-year-old girl called Vanessa，who had difficulty walking，and could not speak.We 41 sat on the floor for our music lessons and Vanessa liked to 42 on my lap．One of her favorite songs was John the Rabbit.It was a call and response song where I sang the call and the students 43 twice while singing the repeating phrase，“Oh，yes！” Vanessa liked to 44 her hands together with mine and clap with me.We probably performed that song during every class，Vanessa and I clapping together.But she 45 said or sang a word.
One day，when the song was finished，Vanessa turned around， 46 me in the eyes，clapped her tiny hands twice and said the words“Oh，yes！” I opened my mouth in 47 and for that moment I was the one who could not speak.When my heart 48 started beating again，I looked over at the assistant teacher to find her also 49 .Through music，we had made an awesome connection.
Several years later，I met Vanessa on the street in town.She waved with a big 50 on her face and then clapped her hands twice，imitating the song we had 51 so many times in our music class.The little girl， 52 her connection with music，left an impression on me that will last forever. Every child has the 53 to learn and grow. It is up to us to 54 the way to reach each and every one of our students.We all must find each child's 55 .

Every object tells a story. Even the most ordinary objects can present to us powerful images. Sometimes it is the ordinary nature of these objects that actually makes them so extraordinary. Such is the case with an old leather shoe in a museum in Alaska. At first glance it does not look like much. It is a woman’s shoe of a style popular in the 1890s. But what is unique(独特的) about this shoe is where it was found. It was discovered on the Checkout Pass, the famous trail used by the people seeking gold in Alaska. Who it belonged to or why it was left there is not known. Was it perhaps dropped by accident as the woman climbed up the 1500 stairs carved outface? Or did she throw away goods that she didn’t need in order to travel lighter?
Over 100, 000 people with “gold fever” made this trip hoping to become millionaires. Few of them understood that on their way they would have to cross a harsh wildness. Unprepared for such a dangerous journey, many died of starvation and exposure to the cold weather.
The Canadian government finally started requiring the gold seekers to bring one ton of supplies with them. This was thought to be enough for a person to survive for one year. They would carry their supplies in backpacks(背包) each weighing up to fifty pounds; it usually took at least 40 trips to get everything to the top and over the pass. Whoever dropped the shoe must have been a brave and determined woman. Perhaps she was successful and made it to Alaska. Perhaps she had to turn back in defeat. No one will ever know for sure, but what we do know is that she took part in one of the greatest adventures in the 19th century.
【小题1】The ordinary woman’s leather shoe is considered unusual because ______.

A．it was an important clue to life in the past

B．it was found on a famous trail

C．it at one time belonged to a VIP

D．it was a fashionable shoe at that time

【小题2】According to this passage, many people who went to Alaska ______.

A．eventually became millionaires	B．brought with them many shoes
C．had conflicts with the Eskimos	D．were not properly equipped

【小题3】 The Canadian government made gold seekers bring one year’s supplies with them so that ______.

A．they would not die of hunger and cold

B．the army would have enough food for fighting a war

C．they would change these goods with the Eskimos

D．the supplies would make Alaska rich

【小题4】No matter what happened to the woman who owned the shoe, ______.

A．she must have lived a happy life

B．she certainly dropped the shoe on purpose

C．her adventurous spirit is definitely admired

D．her other shoes were equally fashionable

Adults usually do not remember most of the things that are taught by their teachers at school. But this story is one such lesson that I will never forget. Every time I drift off course, I think of this story.
It was a normal Monday morning, and my teacher was teaching us on important things in life and about devoting ourselves to what is important to us. This is how the story went:
An old man lived in a certain part of London, and he would wake up every morning and go to the subway. He would get onto the train right to Central London, and then sit at the street corner and beg. He would do this every single day of his life. He sat at the same street corner and begged for almost 20 years.
His house was dirty, and a stench (恶臭) came out of the house and it smelled terrible. The neighbors could not stand the smell any more, so they called for the police officers to clear the place. The officers knocked down the door and cleaned the house. There were small bags of money all over the house that he had collected over the years.
The police counted the money, and they soon realized that the old man was a millionaire (百万富翁). They waited outside his house expecting to share the good news with him. When the old man arrived home that evening, one of the officers told him that there was no need for him to beg any more as he was a rich man now, a millionaire.
But the old man said nothing at all; he went into his house and locked the door. The next morning he woke up as usual, went to the subway, sat at the street corner and continued to beg.
Clearly, this old man had no great plans, dreams or anything significant (有意义的) for his life. We learn nothing from this story other than staying focused on the things we enjoy doing.
【小题1】The neighbor called the police because ______.

A．the old man kept begging money from them every day

B．there was something dangerous in the old man’s house

C．the old man wouldn’t buy tickets for the train

D．they couldn’t bear the smell from the old man’s house

【小题2】When the old man knew he was a millionaire, he ______.

A．remained calm	B．became excited
C．felt worried	D．became nervous

【小题3】What lesson do we learn from the story?

A．Make great plans for your life.

B．Keep on doing what you like.

C．Do something that is good to society.

D．Depend on yourself rather than others.

试题分类