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搜题
【单选题】
催化聚合酶链反应的酶是A.
DNA连接酶
B.
反转录酶
C.
反转录酶
D.
反转录酶
E.
TaqDNA聚合酶
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举一反三
【单选题】While I was looking through the news online，＿．
A.
did a video of a lovely bear come up
B.
did come up a video of a lovely bear
C.
up did a video of a lovely bear come
D.
up came a video of a lovely bear
【简答题】They gave him the worst news any musician could bear: he was gradually going deaf.
【单选题】—Hi! Ann, I have good news for you . —______? What is it ?
A.
What
B.
Who
C.
Ok
D.
Really
【单选题】This passage is mostprobably taken from_______
A.
an advertisement
B.
a news report
C.
an announcement
D.
a novel
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