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【多选题】
变构调节的特点包括A.
变构酶多存在调节亚基和催化亚基
B.
变构剂使酶蛋白构像改变，从而改变酶的活
C.
变构剂与酶分子的特定部位结合
D.
变构酶大多是代谢调节的关键酶
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皮皮学刷刷变学霸
举一反三
【单选题】I myself more——it was a perfect day.
A.
shouldn’t have enjoyed
B.
needn’t have enjoyed
C.
wouldn’t have enjoyed
D.
couldn’t have enjoyed
【单选题】When he entered the classroom, he saw some parents seated ___ the back of it.
A.
in
B.
behind
C.
from
D.
at
【单选题】—Do you think the thief entered through the window? —No, if he had, I don’t believe, _______ broken the living-room’s window.
A.
he would have
B.
he must have
C.
he had
D.
should he have
【单选题】I would have enjoyed myself more _______i gone with a group of friends.
A.
had
B.
if
C.
has
D.
shall
【简答题】I would have enjoyed myself more, if I had gone with a group of friends.可改写为:I would have enjoyed myself more,__________.
【单选题】was Sam aware that he was in danger.
A.
When he entered the forest
B.
After he had entered the forest
C.
Only after entering the forest
D.
Upon entering the forest
【简答题】Paraphrasing: I wedged myself more tightly in front of the TV.
【单选题】Robin ________ volleyball quite well, but he hasn’t played it since he entered senior high school.
A.
is playing
B.
had played
C.
used to play
D.
plays
【单选题】—Do you think the thief entered through the back door? —No, if he had, I don’t believe he ______ the living-room window.
A.
would break
B.
broke
C.
would have broken
D.
had broken
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