试题与答案

That is all they can do _____ the poor s

题型:选择题

题目:

That is all they can do _____ the poor students in that village school.   [ ]

A. help

B. to help

C. helps

D. helped

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析:为了预防食管胃底静脉曲张再次出血,可首选β受体阻滞剂普萘洛尔,该药通过收缩内脏血管,降低门静脉血流而降低门静脉压力,普萘洛尔由10mg/d开始,逐日加10mg,逐渐加量到静息心率降为基础心率...

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