求一篇关于地震的英语作文

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匿名用户
2011-10-16
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What is earthquake?

  An earthquake is the result of a sudden release of energy in the Earth's crust that creates seismic waves(地震波). Earthquakes are recorded with a seismometer(地震检波器), also known as a seismograph(地震仪). The moment magnitude of an earthquake is conventionally reported, or the related and mostly obsolete Richter magnitude(里氏量级), with magnitude 3 or lower earthquakes being mostly imperceptible 感觉不到的 and magnitude 7 causing serious damage over large areas. Intensity of shaking is measured on the modified Mercalli scale(麦加利震级, 麦氏震级).

  At the Earth's surface, earthquakes manifest themselves by a shaking and sometimes displacement (位移)of the ground. When a large earthquake epicenter (震中)is located offshore, the seabed sometimes suffers sufficient displacement to cause a tsunami(海啸). The shaking in earthquakes can also trigger landslides and occasionally volcanic activity.

  In its most generic sense, the word earthquake is used to describe any seismic event—whether a natural phenomenon or an event caused by humans—that generates seismic waves. Earthquakes are caused mostly by rupture(破裂, 裂开) of geological faults(断层), but also by volcanic activity, landslides, mine blasts, and nuclear experiments.

  An earthquake's point of initial rupture is called its focus or hypocenter. The term epicenter means the point at ground level directly above this.
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匿名用户
2011-10-13
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如果是找人代写代答,
网络上有许多笔手或写手是需要付费的,
复制的和原创的价格是不一样的,
原创的是需要支付稿酬的,你懂吗?
看来你是想空手套白狼吗?

如果是请别人帮助的话,
应该有句礼貌的语言,
这么旁若无人般的对着电脑大要(英语)作文合适吗?

再说了大家都素不相识的,
这里又不是你个人的秘书处,
别人凭什么要按照你的要求为你写作,
你又凭什么这样无偿的占有别人的劳动果实并连一句礼貌的语言都没有呢?
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绝吹泪与辈9206
2011-10-16 · TA获得超过9.7万个赞
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