代理型CM合同由建设单位与分包单位直接签订，一般采用()的合同形式。A．固定单价

性温而能温肾助阳的药物是（）

A.雄黄

B.硫黄

C.白矾

D.皂矾

E.胆矾

根据下面对话中的情景，在空白处填入适当的语句，使对话内容完整。

(Jenny and Nancy meet on the street. ) 

J=Jenny；N=Nancy

J: Hello,Nancy.  1  

N: Fine, thanks,Jenny. 

J: I heard you went somewhere for vacation. 

  2  

N: Well,I have been to Hainan Island with my cousins. There are too many exciting things there,especially diving(潜水)in the real sea!

J:   3    My parents and I will go there , too. What should we take?

N: A camera,sunglasses,umbrellas and some cool clothes.

J: OK,thank you.  4  

N: You can get there by plane. Because It's too far away.  5  

J: Thank you! I think we sure will !

发行国内第一张信用卡的是（）。

A.中国银行

B.工商银行

C.建设银行

D.广东发展银行

串级调节系统可以用于非线性对象，但负荷变化不大的场合，能够改善对象特性。