Unit 2 七选五练习 2020-2021学年人教版高中英语必修三

1.Wasp Sting(黄蜂叮咬)Treatment 1 A wasp has two pairs of wings，a stinger and very little hair.These flying，stinging insects are mostly living on the land，but a few wasp species can also live in water.A wasp sting is one of the most terrible things.But they mostly sting a person when they are threatened or when their nest is disturbed.While the wasp inserts and takes out the stinger with ease，the amount of poison that gets in the skin is relatively less. Treatment for wasp stings depends not only on the seriousness but also the number of stingers.2 However，people who develop an allergic(过敏的) reaction to the sting require medication to respond to its effects. The foremost thing is to take the stinger out immediately.3 Don’t break it.Apply an ice pack to reduce the blister.Wash the painful area with a soap.Take some medicine to relieve the pain.The blister will disappear within a couple of hours，although the pain and redness may take a while. If one develops an allergic reaction to