试题与答案

Since everybody will make a mistake, we

题型:选择题

题目:

Since everybody will make a mistake, we        at whoever makes mistakes.[ ]

A. ought to have laughed

B. oughtn't to laugh

C. ought to laugh    

D. should not to laugh

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:临床上常用普鲁卡因行局部浸润麻醉、神经阻滞麻醉,其表面麻醉和硬膜外阻滞效果差,一般不采用。

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