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ground ________地面沉降
参考答案和解析
是指地表岩体或者土体受自然作用或者认为活动影响向下陷落,并在地面形成塌陷坑洞而造成灾害的现象或者过程。
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下图示意1986--2002年我国长江三角洲某地区地面沉降的发展变化。读图完成题。
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food wasteB
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SkywavesC
Either ground waves or skywaves interchangeablyD
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新近堆积的第四系软土固结造成的地面沉降B
抽吸地下液体引起水位或水压下降,造成大面积地面沉降C
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the starter’s frameC
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单选题A ground in an electrical circuit outside the engine room ().A
cannot be detected tinder normal conditionsB
is of no consequence to engineering personnelC
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单选题When using a lightning arrestor, connect which type of ground wire to a good earth ground?()A
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#12 solid copperC
#20 solid copperD
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单选题下列关于地面沉降和地裂缝灾害的叙述中,错误的是()。A
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地下工程失事、地下移动土石、爆破等也会造成地面沉降和地裂缝灾害
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多选题地面沉降的长期观测中,要设置的标准包括( )。A高程基准标准B地面沉降标准C土层分层沉降标准D地下水位下降标准
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