题目内容

18

A. They don't go to see the films as often as they did.
B. They've ever dreamed of going to the moon once.
C. They lived in the same neighborhood when young.
D. They like contemporary movies better than before.

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10. —Don't go ona voyage alone.—Don't worry. .

A. I don't
B. I won't
C. I can't
D. I haven't

右心房的入口是( )

A. 肺静脉口
B. 肺动脉口
C. 上、下腔静脉口
D. 右房室口
E. 左房室口

影响收缩压的主要因素是哪一项( )

A. 外周阻力
B. 心率
C. 搏出量
D. 循环血量
E. 大动脉管径

心动周期和心率的关系,叙述正确的是: ( )

A. 反比关系
B. 正比关系
C. 没有关系
D. 心率加快心动周期变长
E. 心率对心动周期无影响

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