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【判断题】
A260与A280 nm的吸收比值可以表示病毒核酸含量的多少,用于区分不同的病毒:比值小的多是线条病毒,比值高可能是球状病毒。A.
正确
B.
错误
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举一反三
【简答题】货币的本质是固定地起 __________ 作用的商品 。
【简答题】3 如何查找一个元件?
【简答题】Now listen to the following recording and answer questions 20 to 22.
【单选题】___________ couldn’t help stopping to listen to the blind performer’s wonderful music and leavin
A.
22. ___________ couldn’t help stopping to listen to the blind performer’s wonderful music and leaving him some ___________. A．Passer-bys;changes
B.
Passers-by;change
C.
Passer-bys;change
D.
Passers-by;changes
【简答题】Now listen to the following recording and answer questions 20 to 22.
【简答题】Now listen to the following recording and answer questions 20 to 22.
【单选题】Listen to the conversation and choose the best answer.
A.
Fishing by the stream.
B.
Watching birds in the park.
C.
Walking home from work.
D.
Walking to work.
【单选题】Listen to the conversation and choose the best answer.
A.
What movie to see.
B.
The weekend shopping.
C.
The weekend party.
D.
The weekend arrangement.
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