In the forest corresponding to the followi_爱下问搜题

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问题单项选择题

In the forest corresponding to the following binary tree，how many children does node B have？

A．1

B．2

C．3

D．4

答案

参考答案：A

选择题

The teacher asked us not to______ our books or dictionaries when we are in the exam.

A．refer to

B．look up

C．take up

D．consult to

单项选择题

咪达唑仑的效价约为地西泮的（）

A.1.5～2倍

B.2～3倍

C.3～4倍

D.4～5倍

E.5～10倍