不定项选择

不从疾病适应证的需要出发,不顾患者身体安全、不考虑患者的经济负担地过度、重复、超量使用高新技术,是不应该的。

A．正确
B．错误

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单项选择题

As to bar graphs and line graphs, which of the following description is not right?______
A、They are the two major types of graphs that are often used to present results.
B、They are used to show obvious comparison.
C、Bar graphs use horizontal or vertical bars while line graphs use horizontal or vertical lines.
D、More than four types of bars in a bar graph and five lines in a line graph are preferable.

单项选择题

关于无效腔和肺泡通气量，下列叙述中哪项是不正确的？

A.生理无效腔等于肺泡无效腔与解剖无效腔之和
B.健康人平卧时的生理无效腔大于解剖无效腔
C.肺泡无效腔是由于血流在肺内分布不均所造成的
D.肺泡通气量等于（潮气量一无效腔气量）×呼吸频率
E.计算真正有效的气体交换，应以肺泡通气量为准