多数发动机配气机构进气门的头部直径比排气门()。
A.小
B.大
C.一样
参考答案:B
—_____ she have a comic book?
—No, she doesn't have _____ .[ ]
A. Are, one
B. Is, a
C. Does, one
D. Do, some
地球内部可以分为那三层: