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需求量的大小还取决于消费者的收入水平。 ()
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1939年2月，中央决定在各革命根据地政府成立社会部。()
Specifically, they tell them these things: A smoke detector should be placcd on each floor of a home. While sleeping, people are in particular danger of an emergent fire、 and there must he a dctcctor outside each sleeping area. A good site for a detecior would he a hallway that runs between living spaces and bedrooms.
Because of the dead-air space that might be missed by hot air bouncing around above a fire, smoke detcctors should be installed either on the ceiling at least four inches from the nearest wall, or high on a wall at least four, but no further than twelve, inches from the ceiling.
Deteccors should not be mounted near windows, entrances, or other places where drafts (过堂风) might direct the smoke away from the unit. Nor should they be placed in kitchens and garages, where cooking and gas fumes are likely to cause false alarms.
One responsibility of a firefighter is to______.
右上角未标明法定标识的统计报表属于非法统计调查。 ()
指数可反映经济现象变动的程度。 ()
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