有一种太阳能热水器，接收太阳能的15根真空管总有效面积约为1.35m2，能把接收

I have no desire other than to lead a quiet life, ______ from anxiety.

A．absent

B．separate

C．free

D．short

—The book store ________ a big sale. The books there must be very cheap now.

—Sounds great. Let’s go into it and have a look.

A．will have

B．had

C．is having

D．was having

什么是标高？

在压疮分期中，（）对肤色较深的患者难以鉴别.

A.不可分期

B.Ⅱ期

C.Ⅲ期

D.Ⅳ期

E.可疑深层损伤期

F.Ⅰ期

来料加工装配项下用于加工生产返销出口的进口料件免领进口许可证，比如进口食糖、棉花、植物油、羊毛和天然橡胶等。