炭化室的锥度()。
A.机侧比焦侧宽
B.焦侧比机侧宽
C.机焦一样宽
参考答案:B
--- I want to have the film _________. Can I pick it up tomorrow.
--- No, problem.
A.Developed
B.imagined
C.expanded
D.printed
喷油泵的作用是什么?