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问题 多项选择题

椎管狭窄症包括：（）

A.椎管狭窄

B.侧隐窝狭窄

C.椎间孔狭窄

D.椎间盘疝

E.椎间盘变性

答案

参考答案：A, B, C

选择题
It was reported that 115 miners _____ in the flooded mine for eight days were pulled out alive at last.
A. trapped
B. being trapped
C. were trapped
D. had trapped
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不定项选择题

下列各组物质中，与BaCl2属于同一类物质的一组是 [ ]

A．Ba（OH）2

B．HCl

C．KNO3

D．BaO
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