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【单选题】
通过电加热器的风速应控制在( ) m/s 。A.
3~5
B.
4~7
C.
5~8
D.
8~12
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举一反三
【单选题】What is required of Al software to save a life?
A.
It must be able to swim.
B.
It must keep walking round the pool.
C.
It must distinguish between a swimmer and a shadow.
D.
It must save a life within a few months.
【简答题】A．Because she feels very hot in the room. B．Because she wants to avoid meeting people. C．Because she wants to smoke a cigarette outside. D．Because she doesn't like the smell of smoke inside.
【单选题】水体富营养化的后果是（）
A.
由于藻类大量繁殖，死后分解消耗大量氧气，导致鱼类因缺氧而死亡，使渔业产量减少
B.
由于藻类大量繁殖，使鱼类的食物增加，导致渔业产量增加
C.
对渔业产量没有影响
D.
使渔业产量忽高忽低
【简答题】All her life,my mother wanted busy children.It was very important that her house should remain at all times clean and tidy. You could turn your back for a moment in my mother’s house,leave a half-writ...
【单选题】水体富营养化的后果是（）。
A.
由于藻类大量繁殖，使鱼类的食物增加，导致渔业产量增加
B.
由于藻类大量繁殖，死后分解要消耗大量氧气，导致渔类因缺氧而死亡，使渔业产量减少
C.
对渔业产量没有影响D．使渔业产量忽高忽低
【简答题】A．Because she feels very hot in the room. B．Because she wants to avoid meeting people. C．Because she wants to smoke a cigarette outside. D．Because she doesn't like the smell of smoke inside.
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