在居民区及交通道路附近挖的基坑，应设坑盖或可靠围栏，加挂警示标牌，夜间挂()。
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The writer compares an avalanche to________. 查看材料
A. a tornado
B. a falling house of cards
C. a snowstorm
D. aspeeding train
材料题请点击右侧查看材料问题 查看材料
A. out
B. down
C. off
D. from
对同杆塔架设的多层电力线路进行验电时，先验低压，后验高压，先验()层，后验上层。
A. 上
B. 下
C. 远
D. 近
People say that________. 查看材料
A. they do not have time for physical activity
B. getting started into physical activity is not so difficult
C. getting started into physical activity is the most difficult part
D. they prefer keeping the present situation to doing any activities
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