题目内容
（请给出正确答案）
A.while
B.where
C.when
D.however
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更多“Why are some cancers cured by …”相关的问题
Why is it difficult to learn names all over the world？
A．There are many names all over the world.
B．The names in different countries are different.
C．Some names are very long, and some are very short.
D．Some people have nicknames.
()you wish to know why we have placed no further orders with you recently, we are willing to raise a matter that caused us some trouble .
A. since
B. though
C. as
D. although
Why are some people against TV？
A．Because TV programs are not interesting.
B．Because TV viewers are really passive.
C．Because TV prices are very high.
D．Because TV has both advantages and disadvantages.
Why does it take long for people to change their food？
A． Because labs are not easily accessible to researchers.
B． Because some people are reluctant to accept the new diet.
C． Because food consumption is a culture of conservation.
D． Because some scientists are against the growing lab meat.
A.Here you are
B.You are welcome
C.It is OK
D.Don’t worry
Which of the following is the purpose of the first paragraph？
A．To describe some successful doctors.
B．To compare poor writers with diseased people.
C．To tell the teachers why some 'students are poor in health.
D．To show the importance of a teacher's job.
What is color？ Why do some objects look red, others green, others blue？
Color is caused by reflected light rays. We see color because objects reflect light. Some thing that is red reflects mostly red light. In the same way, a green object reflects mostly green light. White objects reflect all colors of light. Black objects do not reflect any light.
What happens to the colors of light that are not reflected？ They are absorbed by the object. The darker the color, the less light is reflected and the more light is absorbed. Light that is absorbed is turned into heat. For this reason, dark-colored clothes are warmer in the sunlight than light-colored clothes.
Which is the main idea of this passage？
A．Dark-colored clothes are warmer in the sunlight.
B．Objects absorb part of the sunlight.
C．Color is caused by reflected light rays.
D．A red object reflects mostly red light.
Why are some women likely to get angry as a man holds the door open for them？
A．Because the man should not hold the door open.
B．Because they think they are looked down upon.
C．Because they are treated too politely.
D．Because men often offend women in this manner.
Why does the woman plan to go to town？
A.To pay her bills in the bank．
B.To buy books in a bookstore．
C.To get some money from the bank．
D.To meet someone in the town．
Why was David able to get the job in the company？
A．He had done well in all his exams.
B．He had written some computer programs.
C．He was good at playing computer games.
D．He had learnt to use computers at school.
