Theair-conditionerisrunninginthewinterandtobestopped,weshould（）
A: closeFanandHumidifieratthesametime
B: firstlycloseFanandthenclosehumidifierimmediately
C: firstlyclosehumidifierandthencloseFanimmediately
D: firstlyclosehumidifierandthencloseFanafter30seconds
A: closeFanandHumidifieratthesametime
B: firstlycloseFanandthenclosehumidifierimmediately
C: firstlyclosehumidifierandthencloseFanimmediately
D: firstlyclosehumidifierandthencloseFanafter30seconds
D
举一反三
- Endotracheal aspiration should be limited to :() A: within 2 seconds B: within 5 seconds C: within 10 seconds D: within 20 seconds E: within 30 seconds
- 确保两次启动之间的时间至少间隔 30 秒。 A: Make sure that the time between starts is a minimum of 30 seconds. B: Check that 30 seconds have elapsed between starts. C: Check that 30 seconds have timed between starts.
- Most of the information kept in short-term memory will be stored for approximately 20 to 30 seconds, but it can be just seconds if rehearsal of the information is prevented.
- 30 seconds, do the test again. A: after (prep.) B: subsequent to C: delay (v.) D: elapse (v.)
- Weshould do all ____ is useful to people. A: B: that C: it D: which
内容
- 0
Weshould（）thenationalflagwhenthesunsets. A: lower B: lowed C: lowing D: lowers
- 1
Weshould（）thosebadhabits. A: getrid B: getof C: getridof D: rid
- 2
Weshould（）thenationalflagwhenthesunrises. A: hoist B: hoists C: hoisting D: hoisted
- 3
It was about 30 seconds before Alex ________ from the water. we are quite scared。
- 4
An average person can remember about ______chunks within 30 seconds。 （ ）。 A: 8 B: 9 C: 7 D: 6