问题
单项选择题
起始密码子
A.AUG
B.GUA
C.UAA UGA UAG
D.AUG UGA UAG
E.AAU AGU GAU
答案
参考答案:A
起始密码子
A.AUG
B.GUA
C.UAA UGA UAG
D.AUG UGA UAG
E.AAU AGU GAU
参考答案:A
用方框中所给单词的适当形式填空,使短文通顺、正确、连贯(每个单词限用一次)。
Dreams take up about one quarter of our 小题1:________ time. People have several 小题2:_______each night. Dreams are like short films. They are usually in color. Some dreams are 小题3:_______ old films. They come to us over and over 小题4:_______. That may be because the dreamer is worrying about something. Dreaming may be a way of trying to find an answer. Some people get new ideas小题5:_______ their work from dreams. They may have been 小题6:_______ about their work all day. These thoughts can carry over into dreams. Sometimes, we 小题7:_______ with a good feeling from a dream. But often we can't remember the dream. Dreams can disappear (消失) 小题8:_______ from memory (记忆). Too much dreaming can be harmful (有害的). The 小题9:_______ we sleep, the longer we dream. The mind is hard at work when we dream. That is 小题10:_______ we may have a long sleep and still wake up tired. |