按规程要求,对安全阀应()做自动排汽试验,以防止安全阀失灵超压。
A.每班
B.每天
C.每周
D.定期
参考答案:D
用所给词的适当形式填空。
1. Could you please ______ (take) out the trash?
2. Would you like ______ (have) a cup of tea?
3. We ______ (buy) some food last week.
4. Sandy wants ______ (invite) her friends to her home for dinner.
5. There are too many ______ (chore) for her mother at home.
6. It's ______ (bore) to do the dishes.
7. Peter doesn't like ______ (make) the bed at all.
8. Could you please not ______ (clean) the library?
9. Let's ______ (make) fruit salad.
选择井底车场形式应满足哪些要求?