题目内容
Humans have four blood types(血型). They are blood type A, B, O and AB.
The table below shows all kinds of possible blood types of parents and their children. Children’s blood types are shown in grey squares.
MOTHER FATHER | A | B | O | AB |
A | A, O | A, B, O, AB | A, O | A, B, AB |
B | A, B, O, AB | B, O | B, O | A, B, AB |
O | A, O | B, O | O | A, B |
AB | A, B, AB | A, B, AB | A, B | A, B, AB |
( ) 56. If both parents are blood type O, then their children must be ________.
A. blood type A B. blood type B
C. blood type AB D. blood type O
( ) 57. If a father is blood type A and a mother is blood type B, then their children’s blood types may be __________.
A. any blood type B. blood type A and B
C. blood type AB and O D. blood type A, B and AB
( ) 58. If both parents are blood type AB, then their children can NOT be ____.
A. blood type A B. blood type AB
C. blood type O D. blood type B
( )59. If both children of the same parents are blood type A, B, O and AB, then their parents should be __________.
A. blood type A and B B. blood type A and AB
C. blood type B and AB D. blood type AB and AB
( ) 60. If one parent is blood type AB, and his or her nine children only get blood type A and B, then the other parent’ s blood type is likely to be(可能)__________.
A. blood type A B. blood type B C. blood type AB D. blood type O
DACAD
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DNA is the whole “map” of the human body. It is something that all humans have, and it tells the body what to do. DNA is the reason that we look like our parents, because we get some of their DNA to make our own.
People have been trying to understand the human body for a long time, In1860, Mr Mendel discovered why we look the same as other people in our family. It is because of small things called “genes”(基因) in our body. In 1953, two scientists, Watson and Crick, found out that those small parts are really messages . They’re written in the DNA with a special language.
In1961, another two scientists found the first “word” that they could understand in that language. It shows how DNA tells the cell﹙细胞﹚to build its parts. So far, scientists have found all the words in the DNA map, but we still do not understand what they all do. By understanding what just one “word ”means, we can help to save people from several illness. So the more we understand, the more doctors will be able to do.
Most people hope that this will help to make better medicine and help sick people. Other people worry that when we learn more “words” and find out more information, we will use it in the wrong way, just to make people more attractive (有吸引力的),or stop sick people getting jobs.
【小题1】When did Mr Mendel discover why we look the same as other people in our family?
A. In 2000. B. In 1961 C. In 1953 D In 1860
【小题2】What did the two scientists find in 1961? They found_____.
A.all the words in the DNA map |
B.Small things called “genes” in our body |
C.The first “word” they could understand in that language |
D.those small parts are written in the DNA with a special language |
A.Make better medicine. | B.Make them get jobs. |
C.Make maps for them. | D.Make them attractive |
A.We look like our parents because of “genes” in our body |
B.We have understand what all the words in the DNA map do |
C.DNA is the whole “map” of the human body. |
D.DNA tells the cell to build its parts. |
A.It can be only bad | B.It can be only good |
C.It can be good but won’t work | D.It can be good and bad |
Have you ever had the strange feeling that you were being watched? You turned around and, sure enough, someone was looking right at you!
Parapsychologists (灵学家) say that humans have a natural ability to sense when someone is looking at them. To research whether such a “sixth sense” really exists, Robert Baker, a psychologist (心理学家) at the University of Kentucky, did two experiments.
In the first one, Baker sat behind unknowing people in public places and stared at the backs of their heads for 5 to 15 minutes. The subjects(受试者)were eating, drinking, reading, studying, watching TV, or working at a computer. Baker made sure that the people could not tell that he was sitting behind them during those periods. Later, when he questioned the subjects, almost all of them said they had no sense that someone was staring at them.
For the second experiment, Baker told the subjects that they would be stared at from time to time from behind in a laboratory setting. The people had to write down when they felt they were being stared at and when they weren’t. Baker found that the subjects were no better at telling when they were stared at and when they weren’t.
Baker concludes that people do not have the ability to sense when they’re being stared at. If people doubt the outcome of his two experiments, said Baker, “I suggest they repeat the experiments and see for themselves.”
【小题1】The aim of the two experiments is to ________.
A.explain when people can have a sixth sense |
B.show how people act while being watched in the lab |
C.study whether humans can sense when they are stared at |
D.prove why humans have a sixth sense |
A.value | B.result | C.performance | D.connection |
A.could tell when they were stared at and when they weren’t. |
B.could tell when they were stared at but couldn’t tell when they weren’t. |
C.couldn’t tell when they were stared at but could tell when they weren’t. |
D.couldn’t tell when they were stared at or when they weren’t. |
A.People are born with a sixth sense. |
B.The experiments support parapsychologists’ idea. |
C.The subjects do not have a sixth sense in the experiments. |
D.People have a sixth sense in all places. |
根据短文内容,从短文后的选项中选出适当的选项补全短文。
The earth is about 4,600 million years old. We humans have lived on the earth for only 35,000 years, but during this period we have changed our planet a lot in many ways. 1
All over the world, people have cut down millions of trees, so more and more kinds of animals and plants are disappearing. In big cities, cars and buses have polluted the air. Factories have also polluted the land and the water.
2 It is important to the earth. But now air pollution is destroying it and that has made a very big hole in the ozone layer (臭氧层). 3 This is very dangerous because it can cause cancer.
Carbon dioxide (CO2) in the air has increased a lot. 4 it has formed a "blanket" (毛毯) around the each. 5 This makes our earth become warmer and warmer. Therefore, this causes the level of the ocean to rise.
All these problems are very serious. We must do something to stop our earth from being polluted anymore.
A. The heat from the sun can' t escape, so the temperature is rising. B. Too much harmful light from the sun passes through it and reaches the earth directly, C. Some things we've done are very good for the earth while some are bad. D. Around the earth, there’s a special kind of oxygen (O2) called "ozone" (O3). E. It mainly comes from different kinds of burning materials. |
根据短文内容,从短文后的选项中选出适当的选项补全短文。
The earth is about 4,600 million years old. We humans have lived on the earth for only 35,000 years, but during this period we have changed our planet a lot in many ways. 1
All over the world, people have cut down millions of trees, so more and more kinds of animals and plants are disappearing. In big cities, cars and buses have polluted the air. Factories have also polluted the land and the water.
2 It is important to the earth. But now air pollution is destroying it and that has made a very big hole in the ozone layer (臭氧层). 3 This is very dangerous because it can cause cancer.
Carbon dioxide (CO2) in the air has increased a lot. 4 it has formed a "blanket" (毛毯) around the each. 5 This makes our earth become warmer and warmer. Therefore, this causes the level of the ocean to rise.
All these problems are very serious. We must do something to stop our earth from being polluted anymore.
A. The heat from the sun can' t escape, so the temperature is rising. B. Too much harmful light from the sun passes through it and reaches the earth directly, C. Some things we've done are very good for the earth while some are bad. D. Around the earth, there’s a special kind of oxygen (O2) called "ozone" (O3). E. It mainly comes from different kinds of burning materials. |