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问题 多项选择题

少突胶质细胞瘤的影像学表现，错误的是（）。

A.弯曲条带状钙化

B.常有囊变区

C.瘤内可有出血

D.钙化的发生率为50％

E.WHO分级常为Ⅱ级

答案

参考答案：C, D, E

单项选择题

Why have the Americans developed space shuttle according to the passage

A．It is a first step to explore outer space.

B．It is a follow-up action of the Apollo moon landings.

C．It is a compromise to the exorbitant human expeditions to the Mars.

D．It is a compensation for the wishful thinking of human landing on the Mars.
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单项选择题

检查（）是否有缺梁、自卸、少柱等现象。

A、采煤机

B、输送机

C、单体支柱
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