Theair-conditionerisrunninginthewinterandtobestopped,weshould（）
A: closeFanandHumidifieratthesametime
B: firstlycloseFanandthenclosehumidifierimmediately
C: firstlyclosehumidifierandthencloseFanimmediately
D: firstlyclosehumidifierandthencloseFanafter30seconds
A: closeFanandHumidifieratthesametime
B: firstlycloseFanandthenclosehumidifierimmediately
C: firstlyclosehumidifierandthencloseFanimmediately
D: firstlyclosehumidifierandthencloseFanafter30seconds
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