平面圆柱齿轮传动可分为:直齿、()、齿轮齿条、斜齿轮、人字齿轮转动。
参考答案:内啮合
—Would you like to go outing with me tonight?
—Oh, with so much homework ________, I’m afraid I couldn’t afford the time.
A.to finish
B.finishing
C.finished
D.finish
Press Photographers
A. passB. make C. turn D. proceed