Germs are very small living things. They are so small that we cannot see them unless we use a microscope. They are found in all kinds of places, all over the world. There are four main types of germs 题目和参考答案——青夏教育精英家教网—

题目内容

Germs are very small living things. They are so small that we cannot see them unless we use a microscope. They are found in all kinds of places, all over the world. There are four main types of germs that they can invade (侵入) plants, animals and people, and sometimes they can make us sick.

Bacteria (细菌) live just about everywhere on earth. Not all bacteria are bad. Some of them are good for our bodies. They help us keep things in balance. Good bacteria live in our bodies and help us use the nutrients in the food we eat and make waste from what's left over. We couldn't make the most of a healthy meal without these important helper germs! On the other hand, there are several types of bad bacteria, including those that cause sore throats.

Viruses (病毒) need a host to keep living. They need to be inside a place of a living plant or animal, including humans, or even inside a bacterium! Whatever a virus lives in is called its host. Once a virus finds the perfect host, the goal is to reproduce and spread. Viruses are pretty tricky because they can change quickly to fit a new environment. When viruses get inside people's bodies, they can spread and make people sick.

Fungi (真菌) are kind of like plants. Unlike other plants, fungi cannot make their own food from soil, water, and air. Fungi love warm and wet places. Most fungi are harmless. The kind that can grow on your skin can be treated. It probably won't hurt you. But it really makes you uncomfortable!

Protozoa (原生动物) are extremely small. Most of them live in water. Some protozoa actually eat bacteria and they are good because they also eat the waste of other small living things. Some protozoa are bad, and they live off of other living things, sometimes humans. For example, if a person drinks unclean water, protozoa may cause health problems.

1.Are germs small?

____________________

2.How many germs are mentioned in the passage?

____________________

3.Why can viruses change quickly?

____________________

4.Where do fungi love to stay?

____________________

5.What does the passage mainly talk about?

____________________

练习册系列答案

相关题目

Grandpa received a mobile phone from Auntie Liu on his ________ birthday.

A.sixty B.sixtieth C.sixties D.sixtieths

根据对话内容, 从方框内的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

A: Nice to meet you! I’m Dave from America.

B: Nice to meet you, too! I’m He Wei, an exchange student from China.

A: China? It’s a great country. 1..

B: Really? Well, next year, you can come to my house for the New Year.

A: OK. 2..

B: Of course not. On the New Year’s Eve, we always make dumplings with family and some coins are put in the dumplings. 3..

A: That’s cool .Anything else?

B: On the New Year’s Day, we Chinese always visit relatives and give gifts to each other.

A: Oh, I like gifts. 4..

B: In China, you shouldn’t open the gift at once. You should wait and open it later.

A: Really? It’s interesting. 5..

B: You’re welcome.

A.Thank you for telling me so much.

B.Do you often get a lot of gifts?

C.The person with coins is lucky.

D.I’m interested in Chinese festivals, especially the Chinese New Year.

E.When I get a gift, could I open it at once?

F.Do you like coins?

G.Would you mind telling me some customs about the festival?

听一段材料,完成下面小题。

1.What has been happening over the past six months?

A.Food prices have been getting higher.

B.People have been getting sick from food.

C.Whole Foods has been selling less food.

2.What food is on the list?

A.Potatoes. B.Red meat. C.Frozen peas.

3.What can the shoppers get within a week?

A.All of their money back.

B.Half of their money back.

C.A receipt for the food they return.

4.Who will help the shoppers?

A.Store managers.

B.Customer service staff.

C.Security guards.

When will the man make a phone call to the woman?

A.On 12th. B.On 14th. C.On 15th.

The School Play

The end of the school year was coming quickly. Rick was so excited because it was time for the school play tryouts. This year's play was called Mystery at the Lighthouse. Rick was hoping to get the lead part of Joe who lives at the lighthouse.

After school, all those who wanted to try out for the ______ met in the gym at 3:30. Rick and his friend, Kevin, sat and waited for their turn to read for the play. The next day the parts were ______ on the wall outside of the gym. Kevin got a part in the play. But Rick did not see his ______ . He felt it funny inside. Rick was sure he would get the part. "I can't understand why I'm not in the play." said Rick to his mom. "Rick, it just means that someone was a little better than you. You shouldn't give up just because of this one time. Look at all the other things you're good at, you're great with ______ and you're a super football player," said Mom. Rick didn't say any words and went to his room.

The next day at school. Mr. Carter, the art teacher, asked Rick, "I know how good you are in art, are you interested in doing some drawing and painting for the play?" "You want me to draw for the play? Really?" asked Rick. "I sure do," said Rick ______. Rick was so happy about being part of the play after all, Rick stayed after school each day for the next week and drew a big lighthouse and painted it. He also drew some boats in the water and painted those too. He was so excited on the night of the play. When it was time for the play, he ______ from the side of the stage as his friend, Kevin, said his part of the play. At the end of the show, Mr. Carter called all the students onto the stage that helped with the artwork, lights, and ______ things around on stage during this time, Rick felt ______ of his work. He thought he would do the artwork better. It was so much fun!

1.A.dance B.football C.play D.painting

2.A.posted B.marked C.tied D.published

3.A.picture B.artwork C.house D.name

4.A.act B.speech C.art D.music

5.A.sadly B.confidently C.doubtfully D.worriedly

6.A.watched B.interrupted C.noticed D.complained

7.A.inventing B.throwing C.sharing D.moving

8.A.tired B.proud C.curious D.afraid

—________ did you go last Sunday?

—We went to the science museum with my physics teacher.

A.How B.Where C.When D.Why

Melissa ________ several novels since 2018. One of them is the best-seller.

A.will write B.is writing C.has written D.wrote

Every day cars kill or hurt many people in the roads. Sometimes the drivers drive too fast or do not drive carefully enough. Some of them _________ the traffic rules and cause accidents.

According to some researches, it is usually the pedestrians（行人）who cause the accidents. A lot of road users are very _________. They walk or run across the roads _________the cars. They walk in the roads but not on the walkways. They get into or out of cars in the middle of the road. Some do not take the trouble to _________ the green lights and simply cross the roads against the red lights.

Many people think accidents often happen in_________ roads in large cities, but this is not always true._________, Tokyo is one of the world's largest cities and probably one of the busiest cities, however, there are_________accidents to pedestrians. The reason is that the police there are very _________and the pedestrians are very careful. Pedestrians never cross against a red light and they _________ follow traffic rules.

Do you know alcohol（酒精）is another main cause of traffic accidents? It delays（拖延）people's response. Those who have drunk alcohol are____________in making decisions. They need a few more seconds to react（反应）. Alcohol drinking is especially dangerous for motor car drivers. It is not only drivers who may have accidents after drinking. Drunken pedestrians may put their lives in danger as well.

1.A.make B.break C.follow D.remember

2.A.tired B.cheerful C.careless D.frightened

3.A.at the end of B.in the center of C.on top of D.in front of

4.A.care for B.wait for C.search for D.look for

5.A.busy B.wide C.clean D.new

6.A.In fact B.By the way C.For example D.In other words

7.A.very few B.so many C.only some D.plenty of

8.A.kind B.polite C.patient D.strict

9.A.even B.never C.hardly D.always

10.A.slow B.active C.excited D.lazy

试题分类