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问题 单项选择题 A1/A2型题

全身血液循环的调节中下列选项中正确的是（）

A.冠脉循环对氧的摄取率可达50%

B.静脉系统容纳全身55%的循环血容量

C.肾血流量为心排血量的20%

D.体内各脏器血流量差异不大

E.全身血管阻力主要由静脉血压决定

答案

参考答案：C

解析：全身血管阻力主要由动脉口径决定，静脉系统容纳全身60%～70%的循环血容量。

单项选择题

食管癌哪段食管易发生食管-气管瘘()

A、上、下段 

B、上、中、下段 

C、中、下段 

D、下段 

E、上、中段
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完形填空

完成句子（共10小题；每小题1.5分，满分15分）

71. As Liu Qian puts it , it’s not the magic that makes it work ,       (我们的工作方式)that makes it magic. ( way )

72.         ,(尽管他的想法听起来奇怪)it was accepted by all the people at the meeting. (as )

73. It’s           (你很愚蠢) be involoved in the trouble. (silly)

74. Mike           (肯定不在打扫)the classroom now. I saw him playing basketball on the playground a moment ago. ( clean )

75. Do remember        (把家庭作业交上来)before you go to your P.E class. ( have )

76.            (他所需要的)is enough time and what I need are enough books.( what )

77.          (困在)in the collapsed coal mine for more than 70 hours , the workers survived by eating newspapers. ( trap )

78. Your advice         (她等待)till next week is unreasonable, so she is wise not to take it. (wait )

79.               (如果你打开电视)and you will often see advertisements showing happy families. (turn )

80. Oh,             (多有趣)to skate on real rice! ( fun )
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