第一心音减弱不常见于A．二尖瓣关闭不全 B．主动脉瓣关闭不全

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问题单项选择题

第一心音减弱不常见于

A．二尖瓣关闭不全

B．主动脉瓣关闭不全

C．二尖瓣狭窄

D．心肌炎

E．心肌梗死

答案

参考答案：C

填空题

根据短文内容，从方框中选词并用其适当形式填空。词只能使用一次。

friend, big, from, we, be, name, in, where, too, student

     I am a new student. My __1__ is Mary. I am thirteen.  I'm in Class Four. This is my classroom. It's
very __2__. This is my small desk.  It's new.  The small desks are for the __3__. That's a big desk. It's
for __4__ teacher.
     __5__ is my bag? Guess,  yes,  it's __6__ my desk. Liu Li and Wang Fang __7__ my classmates.
They are thirteen, __8__. Liu Li is from Hebei, and Wang Fang is __9__ Shanghai. They are my new
__10__.

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单项选择题

每道题包含两套图形和可供选择的4个图形。这两套图形具有某种相似性，也存在某种差异。要求你从四个选项中选择最适合取代问号的一个。正确的答案应不仅使两套图形表现出最大的相似性，而且使第二套图形也表现出自己的特征。

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