题目内容

Specifically, they tell them these things: A smoke detector should be placed on each floor of a home. While sleeping, people are in particular danger of an emergent fire, and there must be a detector outside each sleeping area. A good site for a detector would be 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 detectors 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.
Detectors 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 ______________.

A. install smoke detectors in residents&39; homes
B. check if smoke detectors are properly installed
C. develop fire safety programs for schools
D. speak to residents about how to prevent fires

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一朵雪花的体态是轻盈的,宛如六枚小银针,千针万线,给S大学校园绣出了合身的水晶外套。但是,正如童话世界也有缺陷一样,文史楼北墙畔一株年轻的龙柏,由于一夜风摧雪压,已经倾侧成30°斜角了。
远处走来几个身背照相机的年轻人二其中那位穿黑呢大衣的姑娘真美,一双亮晶晶杏核儿大眼,似湖?似星?谁也说不清,只惹得路人不时朝她张望。这群市大学生摄影协会会员准备捕捉大自然恩赐的美妙镜头,心情舒畅地说笑着,渐渐地走近这棵倾斜的龙柏。
“在文史楼前拍张雪景吧!”一个浑厚的男中音提议。
“不,这棵龙柏被风雪压斜了,缺乏自然美。”姑娘那双纤手朝不远处一指。“喏,到生物系的小植物园去,那儿不仅有龙柏,还有雪松、扁柏呢。”
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上课铃声响了。他疾步如飞地向教室奔去!
静谧。点点不同的浅蓝色脚印留在雪地里,组合成一行行无人辨识的文字,蕴藏着精致微妙的内涵。那株龙柏静静注视着面前的雪地,仿佛苦心思索关于美的神秘的定义。

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