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【单选题】
Firefighters are often asked to speak to school and community groups about the importance of fire safety,particularly fire prevention and detection. Because smoke detectors reduce the risk of dying in a fire by half, firefighters often provide audiences with information on how to install these protective devices in their homes. 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 ofthe dead-air space that might be missed by turbulent 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,exterior doors,or other places where drafts 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. The passage indicates that one responsibility of a firefighter is to
A.
install smoke detectors in the homes of residents in the community.
B.
check homes to see if smoke detectors have been properly installed.
C.
develop fire safety programs for community leaders and school teachers.
D.
speak to school children about the importance of preventing fires.
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举一反三
【多选题】运动缺乏是指
A.
每周锻炼不足 3 次
B.
每次运动时间不足 10 分钟
C.
每次运动中的心率低于 110 次 / 分
D.
每周锻炼不足 2 次
【单选题】在 Word 2010 中,对论文进行编辑排版,要在开头处插入目录,可以选择“引用”选项卡,单机的“目录”组中的“目录”下拉按钮,在展开的下拉面板中选择“插入目录”选项。以下说法错误的是( )。
A.
必须先将标题样式应用到要包括在目录中的标题上
B.
插入的目录不能更新
C.
插入的目录可以更新
D.
插入的目录中显示的级别可以设置
【多选题】运动缺乏是指“( )”。
A.
每周运动不足3次
B.
运动心率偏低
C.
运动强度偏低
D.
每次运动不足30分钟
【多选题】运动缺乏是指“( )”。
A.
每周运动不足3次
B.
每次运动不足30分钟
C.
运动心率偏低
D.
运动强度偏低
E.
最大摄氧量偏低
【单选题】I cannot understand
A.
after
B.
before
C.
while
D.
when
【简答题】Combine the following sentences using “even though.” Sample: I am in high school. I cannot answer confidently.Even though I am in high school, I cannot answer confidently. Or: I cannot answer confiden...
【简答题】I eat and drink whatever I like; and sleep when I cannot keep awake.
【判断题】在word2010的“编辑”组中不包括“转到”命令。( )
A.
正确
B.
错误
【多选题】运动缺乏是指“( )”。
A.
运动强度偏低
B.
每次运动不足 30 分钟
C.
每周运动不足 3 次
D.
运动心率偏低
【多选题】运动缺乏是指()
A.
身体缺乏运动刺激,不运动或很少运动
B.
每周运动少于3次
C.
每次运动少于10分钟
D.
运动心率少于110次/分
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