试题与答案

下列说法中正确的是( ) A.运动得越快的汽车越不容易停下来,是因为汽车运动得越

题型:选择题

题目:

下列说法中正确的是(  )

A.运动得越快的汽车越不容易停下来,是因为汽车运动得越快惯性越大

B.马能够把车拉动,是因为马拉车的力大于车拉马的力

C.跳高运动员从地面上跳起时,地面给运动员的支持力大于运动员受到的重力

D.做平抛运动的物体,在空中的飞行时间由抛出时的高度和初速度共同决定

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B解析:[解题思路] 一般静滴用0.2%氯化钾(含钾27mmol/kg),最高浓度不超过0.3%(含钾 40mmol/L)。含钾液浓度过高、速度过快(不得直接静推),可发生心肌抑制,迅速心脏停跳死亡。[命题规律] 考察“氯...

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