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问题 选择题

中国古代早期的政治制度对后世产生了深远影响。当今社会提倡尊老爱幼、家庭和睦等文明行为，追溯历史渊源应与下列哪一制度有关

A．禅让制

B．宗法制

C．分封制

D．郡县制

答案

答案：B

单项选择题

Questions 14-22


·Look at the ten statements for this part.
·You will hear apassage about "Credit Cards History ". You will listen to it twice.
·Decide whetheryou think each statement is right(R), wrong(W) or not mentioned(NM).
·Markyour answers on the Answer Sheet.

The early cards required payment within a month.

A．Right

B．Wrong

C．Not Mentioned
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单项选择题

Austin-Flint杂音的发生与以下哪项有关（）

A.血流加速

B.肺动脉高压

C.左心房巨大血栓形成

D.主动脉瓣狭窄

E.主动脉瓣关闭不全
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