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问题 单项选择题

关于细胞凋亡和细胞坏死的叙述，错误的是（）

A.细胞凋亡是生理性的，细胞坏死是病理性的

B.细胞凋亡是主动性的，细胞坏死是被动性的

C.细胞凋亡是急性的，细胞坏死是慢性的

D.细胞凋亡是由基因控制的，细胞坏死是外界因素引起的

答案

参考答案：C

完形填空

These days the severe weather in Beijing has aroused public concern.In areas    小题1:   the ground can be seen ,the landscape is yellow or gray ,The citizens surveyed complained    小题2:   the loose soil and dust blanketed streets, removing the    小题3:   （便利）of travelling around ,When it came to outdoor activities, they had no choice    小题4:  to wear face masks to protect     小题5:  The Weather Board sent an alarm, w    小题6:   that the conditions were most likely to last until   小题7:    （星期三），Faced with this emergency ,the government has Taken i    小题8:   measures like shutting down polluting factories, “That;sf    小题9:   from enough.”an official said ,“We must not any longer seek”rapid growth    小题10:   the expense of environment ! If we don’t get started from now on ,we will have to pay a heavier price!”
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多项选择题

合成高分子材料燃烧会产生（）等许多有毒或刺激性气体。

A、氯化氢

B、光气

C、氢气

D、氧化氮

E、氰化氢
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