在选择较低的控制风险估计水平下，必须执行的控制测试的种类为( )。
A．分析测试
B．额外控制测试
C．计划控制测试
D．同步控制测试
参考答案：C
1. Open time:8:30 a. m. -4:00 p. m. from Monday to Friday
2. No talking.
3. No food.
4. No listening to music.
5. No photos.
6. No taking books out without permission (允许) .
7. Keep the library books for one week.
8. Return books on time.36. We can read books .
9. Renew (续借) books on time.
10. Pay for the lost books.
1. We can read books .
A. at 8:00 a. m. on Monday
B. at 9:00 a. m. on Sunday
C. at 3:15 p. m. on Thursday
D. at 4:30 p. m. on Wednesday
2. We can't according to the rules.
A. borrow books
B. renew books
C, take books out without permission
D. read books
3. We have to if we lose library books.
A. pay for them
B. buy them
C. return them
D．renew them
4. It's not polite（礼貌）to in the library.
A. retum books on time
B．renew books on time
C．borrow books
D．talk loudly
5. We must leave the library____.
A. at 2:00 p.m.
B. before 4:00 p.m.
C. after 4:00 p.m.
D. at 8:30 a.m.
以下各种矩形风管无法兰连接形式的附件板厚不正确的是( )。
A．C形插条的附件板厚≥1.0mm
B．包边立咬口的附件板厚≥0.7mm
C．薄钢板法兰插条的附件板厚≥1.0mm
D．立联合角形插条的附件板厚≥0.7mm
E．薄钢板法兰弹簧夹的附件板厚≥1.0mm
