Section A
Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A, B, C and D, and decide which is the best answer.
听力原文:M: I left 20 pages here: to copy. Here is the receipt.
W: I'm sorry, sir. But we're a little behind. Could you come back in a few minutes?
Q: What does the woman mean?
(12)
A.She will give him the receipt later.
B.The man should make his own copies.
C.She has not got the man's copies ready.
D.The man forgot to make the copies for her.
第1题
产生第一心音的主要机制是
A.二尖瓣、三尖瓣开放
B.二尖瓣、三尖瓣关闭
C.主动脉瓣、肺动脉瓣开放
D.主动脉瓣、肺动脉瓣关闭
E.以上均不对
第2题
产生第一心音的主要机理是
A.心房、心室肌收缩
B.二尖瓣、三尖瓣关闭
C.主动脉瓣、肺动脉瓣开放
D.二尖瓣、三尖瓣开放
E.主动脉瓣、肺动脉瓣关闭
第3题
产生第一心音的主要机制是
A.二尖瓣、二尖瓣开放
B.主动脉瓣、肺动脉瓣关闭
C.二尖瓣、三尖瓣关闭
D.主动脉瓣、肺动脉瓣开放
E.心房、心室肌收缩
第5题
产生第二心音的主要机制是
A.主动脉瓣开放
B.二、三尖瓣关闭
C.主、肺动脉瓣关闭
D.二尖瓣、主动脉瓣关闭
E.二尖瓣、主动脉瓣开放
第10题
A.二尖瓣和三尖瓣关闭时的振动
B.二尖瓣和三尖瓣开放时的振动
C.二尖瓣和主动脉瓣关闭时的振动
D.主动脉瓣和肺动脉瓣关闭时的振动
E.主动脉瓣和肺动脉瓣开放时的振动
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