120控制阀的加速缓解阀由阀套、弹簧、夹心阀、膜板、顶杆、()、止回阀等组成。
参考答案:加速活塞
根据《2000年国际贸易术语解释通则》,在下列哪些术语中,由卖方办理进口结关手续
A.CIF
B.DDP
C.DDU
D.DES
—It’ s sunny today, Daddy, How about going swimming with me?
—_______. Let’s ask your mommy to go with us.
A.Don’t worry
B.Never mind
C.Not at all
D.Good idea