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问题 单项选择题

臂丛由哪些脊神经组成

A．C5～8，T1
B．C5～6
C．C6～8～T1
D．L4～5～S1～3
E．C8～T1

答案

参考答案：A

选择题
It is reported that a woman as well as two children ______ from a big fire yesterday.

A. was saved    
B. were saved    
C. had been saved    
D. have been saved
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单项选择题

肺炎球菌肺炎常见于( )

A．老年

B．儿童

C．青少年

D．幼儿

E．青壮年
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