四级考试阅读备考笔记参考

四级考试阅读备考笔记参考

　　Causes are classified as necessary, sufficient, or contributory(起辅助作用的). A necessary cause is one which must be present for the effect to occur, as combustion ，is necessary to drive a gasoline engine. A sufficient cause is one which can produce an effect unaided , though there may be more than one sufficient cause: a dead battery is enough to keep a car from starting, but faulty spark plugs(火花塞)or an empty gas tank will have the same effect. A contributory cause is one which helps to produce an effect but cannot do so by itself, as running through a red light may help cause an accident, though other factors --- pedestrians or other cars in the intersection-must also be present.

　　4. Your refrigerator is not working and you have found that the electric power has been cut off.

　　The power failure is a ____.

　　A) necessary cause B) sufficient cause

　　C) contributory cause D) none of them

　　注：断电不是冰箱不工作的必要原因，而是原因之一，冰箱坏了也可以导致冰箱不工作。

　　Causes are classified as necessary, sufficient, or contributory(起辅助作用的). A necessary cause is one which must be present for the effect to occur, as combustion ，is necessary to drive a gasoline engine. A sufficient cause is one which can produce an effect unaided , though there may be more than one sufficient cause: a dead battery is enough to keep a car from starting, but faulty spark plugs(火花塞)or an empty gas tank will have the same effect. A contributory cause is one which helps to produce an effect but cannot do so by itself, as running through a red light may help cause an accident, though other factors --- pedestrians or other cars in the intersection-must also be present.

【四级考试阅读备考笔记参考】相关文章：

雅思阅读考试备考方法07-04

四级考试阅读题型07-04

雅思阅读考试备战经典笔记07-04

英语四级考试写作参考范文07-04

托业中有什么阅读考试及备考方法07-04

英语四级考试写作题专项训练及参考范文07-04

英语四级考试备考作文Protecting the Intangible Cultural Heritages训练题07-04

雅思口语考试备考误区07-04

四级考试写作点评07-04

四级考试写作范文07-04