汽油机吸入和压缩的是(),柴油机吸入和压缩的是空气。
参考答案:空气和汽油蒸汽的混合气(或答油气混合气)
--We'd better hurry; we'll be late.
--________? Do you really want to listen to the boring lecture?
A.For what
B.How so
C.What else
D.So what
基线稳定度