if they are burned,they give _poisonous gases中间填什么?
人气:202 ℃ 时间:2020-05-17 03:30:01
解答
give off 放出,释放 ,散发出give off,send forth,or discharge; as of light,heat,or radiation,vapor,etc.; give out与give off 都是释放、散发的意思,也可以填 off 或out如果受到燃烧,他们就会释放出有毒气体....
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