丁卡因通常不用于（） A.表面麻醉 B.浸润麻醉 C.传导麻醉 D.腰麻 E.硬膜外

In his speech at the conference, the Chairman solemnly stated that the responsibility to our lives and the kind of world in that we live is ours and ours alone.

A．for ... in which

B．of... for which

C．of... in which

D．for ... on which

Zhou Yang went on________ trip to Tibet. [ ]

A. a seven-days    

B. a seven-day 

C. seven day  

D. seven-days

档案展览服务

关于仲裁协议的作用，说法错误的是( )。

A．合同当事人不受仲裁协议的约束

B．是仲裁机构对纠纷进行仲裁的先决条件

C．排除了法院对纠纷的管辖权

D．仲裁机构应按仲裁协议进行仲裁

铝管焊接后，应用60~80℃的热水冲洗，并用毛刷或铜刷将残渣刷干净。