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问题 填空题

中枢神经系统中参与控制的主要有小脑、基底核和_______。

答案

参考答案：脊髓后索

选择题
Mrs Smith ____ her keys in the office, so she had to wait until her husband ____ home.

A. has left; comes
B. left; had come
C. had left; would come
D. had left; came
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单项选择题

有14个纸盒，其中有装1只球的，也有装2只和3只球的。这些球共有25只，装1只球的盒数等于装2只球和3只球的盒数和。装3只球的盒子有多少个( )

A．7

B．5

C．4

D．3
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