小儿室间隔缺损不能自然闭合的为()A．干下型室间隔缺损 B．肌部_爱下问搜题

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问题单项选择题

小儿室间隔缺损不能自然闭合的为()

A．干下型室间隔缺损

B．肌部室间隔缺损

C．膜部室间隔缺损

D．干上型室间隔缺损

E．以上都是

答案

参考答案：A

选择题

Now the world's attention _____ the stocking markets, as they have great influence in the world's economy.

A. is fixing on
B. has fixed on
C. is being fixed on
D. had been fixed on

单项选择题

正常情况下CN需要释放RAB时将发起（）过程。

A.RAB释放请求

B.RAB分配

C.IU释放请求

D.IU释放