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问题 单项选择题

哪项检查前需要做碘过敏试验，检查后要严密观察腹痛和腹部体征（）

A.静脉胆道造影

B.口服胆囊造影

C.经皮肝穿刺胆道造影

D.经内镜逆行胆胰管造影

E.B超

答案

参考答案：C

选择题

We are working ______ to get the work done on time. There is only one day left before it must be finished. [ ]

A. at present

B. like crazy

C. as usual

D. from time to time

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单项选择题

曲轴轴颈表面擦伤或腐蚀后应（）修理。

A．钳工

B．车削

C．磨削

D．不必
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