题目

阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。选项中有两项为多余选项。 A crash helmet is aprotective helmet which is designed to prevent head injuries in a crash.Numerous scientific studies have demonstrated that wearing a crash helmet in acrash greatly reduces the risk of injuries.  Inareas where such helmets are not required, they are often in common use amongcyclists, motorcyclists, and other individuals who are vulnerable to injuriesin crashes. Helmets have not alwayslooked like the modern, encased units we are used to in today's world. Theywere actually fairly simple.  Today, nearly every professional sport requiresplayers to wear helmets9 with the express purpose of making concussions（脑震荡）and brain injuries less serious. Typically, a crash helmet hasa hard outer shell which is designed to resist penetration（穿透），and a thick foam inner lining. As a generalrule, once a crash helmet has been involved in an accident, even if it appearsto be in good shape, the integrity of the helmet may have been damaged. A crash helmet can have anumber of different styles.  Itis important to fit a crash helmet properly, so that it does not wiggle or moveon the head, as an ill-fitting helmet will not provide adequate protection in acollision.  In addition to bicyclistsand motorcyclists, test pilots, stunt drivers, horseback riders, race cardrivers, and people who engage in various motocross sports should all wear crashhelmets for protection. The use of helmets is also strongly recommended formany sports such as American football and hockey. A．Therefore,it must be thrown away. B．Manypeople can benefit from wearing a crash helmet. C．The mostcommon motorcycle helmet is the full face helmet. D．So crashhelmets are required by law in many regions of the world. E．All ofthem are designed to cover the head and at least part of the face. F．Footballhelmets are some of the most recognizable pieces of sports equipment. G．However,the reason they were worn has remained the same throughout history. 答案：【1】D【2】G【3】A【4】E【5】B

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