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【单选题】
如果一种商品需要交税,则该商品的需求价格弹性越大( )。A.
消费者和销售者越有可能平均分担税收。
B.
税收带来的收入越大。
C.
消费者承担税收的比例也越大。
D.
税收带来的收入越少。
E.
税收更有可能通过价格的变化来体现，而不是通过数量的变化来体现。
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【单选题】听力原文：M: I didn't expect to see you here. W: Francis was sick and asked me to work today instead. Q: What can be concluded from this conversation? (14)
A.
The woman is taking Francis'place at work.
B.
Francis and the woman are working together today.
C.
The woman is expecting to take today off.
D.
Francis asked if the woman was sick.
【简答题】1953年James watson和Francis Crick提出的______模型，标志着遗传学进入了分子遗传学时期。
【简答题】(1) Francis Watson was far from being ____(mere) a furniture expert.
【单选题】In ____, the double-helix structure of DNA was determined by James Watson and Francis Crick who published their discoveries in Nature.
A.
1943
B.
1948
C.
1953
D.
1958
【单选题】The first technological revolution in modern biology started when James Watson and Francis Crick described the structure of DNA half a century ago. That established the fields of molecular and cell bi...
A.
The molecular and cell structure are found during the first revolution.
B.
Scientists sequenced the human genome half a century ago.
C.
Scientists have completely understood the mystery of DNA
D.
The origins of some diseases have been found in the second revolution.
【简答题】计算机的发展阶段经历了 ( ) 、 ( ) ( ) 、 ( )四个阶段。
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