吸入性损伤(呼吸道烧伤)的致病作用包括________作用和________作用。
参考答案:热力‖有害气体的化学损伤
I have been told that the new law will come into ______ on January 1st next year.
A.effect
B.use
C.service
D.existence
鲸生活在海洋中,但它用肺呼吸,而且是胎生、哺乳的,所以它应该属于( )
A.鱼类
B.两栖类
C.鸟类
D.哺乳类