气管内吸痰一次吸引时间不宜超过15秒，其主要原因是

A．吸痰器工作时间过长易损坏

B．吸痰管通过痰液过多易阻塞

C．引起患者刺激性呛咳造成不适

D．引起患者缺氧和发绀

E．吸痰用托盘暴露时间过久造成细菌感染

用所给词的适当形式填空。

1. Tell me how ________  (make)a banana milk shake.

2. How many ________ (baby) are there in the room?

3. Give Jim three ________ (box) of ( book)，please.

4. Chinese like tea ________ (with) anything in it.

5. Let me ________ (pour) the water into the glass.

6. Try your best, and this is your ________ (finally) chance (机会）．