液压缸的结构基本上可以分为缸筒、缸底、活塞、活塞杆、缸盖、密封装置、()和排气装置等。
参考答案:缓冲装置
34. By no means _____ of our students to drop out of school.
A.will we allow
B.we will allow
C.we allow
D.must we allow
—It sounds to me as if he knows a lot about computers.
—He is a person who is fond of________.
A.showing up
B.making up
C.showing off
D.making out