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【单选题】
做叶绿体色素提取和分离实验时,滤纸条上出现的 4 条色素带中,在层析液中溶解度最大的和色素带最宽的分别是( )A.
叶绿素 b 和叶绿素 a
B.
胡萝卜素和叶黄素
C.
叶绿素 b 和叶黄素
D.
胡萝卜素和叶绿素 a
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【单选题】Do you know ______ during the coming summer holiday?
A.
what will Tom do
B.
what did Tom do
C.
what Tom will do
D.
what Tom did
【简答题】Activity 14. Read and match. 作业 1). A balanced diet A. who are on diet are not healthy. 2). The young girl B. which contains fruit and vegetable is good for health. 3). Could you tell me some food C. ...
【单选题】纸币之所以能够产生和流通根本上是由于（ ）
A.
国家的强制力量
B.
货币执行流通手段的职能的特点：必须是现实的货币，但未必是足值的货币
C.
货币执行价值尺度的职能的特点：可以只是观念上的货币
D.
纸币具有一定的含金量，能兑换成金属货币
【单选题】听力原文：W: Excuse me. Do you know how this works? M: Yes. Put the washing inside.., shut the door.., the money goes in here. Then when the machine starts you have to put the soap powder in through here. ...
A.
The woman is willing to do the washing for the man.
B.
The man wants the woman to do the washing for him.
C.
The woman knows little about the machine.
D.
The man knows nothing about the machine.
【单选题】Do you know what time the plane ______ Moscow.
A.
gets
B.
reaches to
C.
arrives in
D.
arrives at
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