决定是否清洗拆卸过滤器,应根据过滤器两端压差大小来决定。
参考答案:对
—It's sunny today. How about going skiing in Yingyue Park ?
—____________! Let's ask the twins to go with us. [ ]
A. Sounds great.
B. Best wishes.
C. Good luck.
D. That's OK.
以下对老年人用药剂量的叙述中,最正确的是
A.1/3~1/2B.3/4C.常用量的3/4D.最大剂量的1/3~1/2E.一般给予成人常用量的3/4