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【單選題】
雙鏈DNA分子中，已知其中一條鏈中(A+G)/(T+C)=0.4，那么以它互補(bǔ)鏈為模板轉(zhuǎn)錄成的mRNA中(A+G)/(U+C)是
A.
2.5
B.
1
C.
0.4
D.
5.2
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舉報(bào)參考答案：
舉一反三
【單選題】What is the writer’s attitude towards the generation gap?
A.
Unacceptable.
B.
Awful.
C.
Funny.
D.
Common.
【單選題】What does the speaker think all that some students care for is?
A.
friends
B.
Playing sports
C.
Having a good time.
【單選題】Why does the speaker begin to feel the pressure of work?
A.
Because she can’t borrow books which she needs from the library
B.
Because she has lots of reference books to read, and the courses are difficult
C.
Though the courses are not too hard for her, she has to read too many books
【單選題】Have a good rest, for you need to _____ your energy for the tennis match this afternoon.
A.
leave
B.
reserve
C.
hold
D.
get
相關(guān)題目：
【單選題】What is the writer’s attitude towards the generation gap?
A.
Unacceptable.
B.
Awful.
C.
Funny.
D.
Common.
【單選題】What does the speaker think all that some students care for is?
A.
friends
B.
Playing sports
C.
Having a good time.
【單選題】Why does the speaker begin to feel the pressure of work?
A.
Because she can’t borrow books which she needs from the library
B.
Because she has lots of reference books to read, and the courses are difficult
C.
Though the courses are not too hard for her, she has to read too many books
【單選題】Have a good rest, for you need to _____ your energy for the tennis match this afternoon.
A.
leave
B.
reserve
C.
hold
D.
get
參考解析：
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