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问题 单项选择题

患者54岁，肥胖，5年来经常劳累后心前区疼痛，休息后好转，近日心绞痛发作频繁，来门诊检查血压20/12kPa(150/90mmHg)，医生不应采取的措施

A．做心电图检查
B．心脏彩超
C．运动试验
D．收院治疗
E．向家属交待病情

答案

参考答案：C

填空题

已知一个样本1、3、2、5、x，它的平均数是3，则这个样本的标准差为______．
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单项选择题


Passage Two
Questions 30 to 32 are based on the passage you have just heard.

A．Most victims were rescued successfully.

B．Someone in the firm was to blame for the explosion.

C．The firemen were very brave.

D．The press reporter arrived too late to interview anyone.
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