1.According to the passage,chemical burns are always 　. 

　　A.superficial B.partial thickness C.full thickness D.fatal harm

　　2.When giving first aid for chemical burns,you should 　. 

　　A.wear gloves to protect yourself B.close the window to keep the fumes

　　C.avoid using cling film and plastic bags D.remove the clothing sticking to the burn

　　3.People are advised not to touch the water used to cool the burn because 　. 

　　A.it may cause short shock to them B.it can be used as evidence for doctors

　　C.it may also cause chemical burns to them D.it can be used in different ways in the future

　　4.What should you do if a large chemical spill has occurred?()

　　A.Ask some bystanders for help. B.Call the police station for help at once.

　　C.Inform the firemen and policemen immediately. D.Leave the scene of the accident as soon as possible.

　　Ⅲ.阅读填句(2015石家庄高三第一次模拟)

　　根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

　　We all face quantities of stresses in day-to-day living,whether at work,in the home,or anywhere in between.1.　 Here’s how stress can help us on an everyday basis. 

　　◆Sharpening your memory.

　　Did you ever notice that sometimes when you are stressed,your memory seems to improve?Remember that test you passed where the answers seemed to come out of nowhere?2.　It’s because of stress hormones (荷尔蒙) that increase your alertness when it’s most needed. 

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