可以采取一下措施来减少液压冲击:使完全冲击变为();限制管中油液的();用()或在冲击源处设置(),以吸收液压冲击的能量。
参考答案:不完全冲击;流速;橡皮软管;蓄能器
你能找出下列句子中的错误吗?选出来并改一改。
( ) 1. Where did you do on your holiday? ________________
A B C
( ) 2. I am tired and I had a cold yesterday. ________________
( ) 3. My father went to work by bus every day. ________________
( ) 4. — Did you read books? — Yes, I didn't. ________________
钵花被广泛应用于宴会、会议布置、()等各种礼仪场合。
A、露地布置
B、街头美化
C、祝贺开业
D、居家装饰