确诊溃疡活动性出血的最可靠方法是（） A.B超检查 B.早期胃镜检查 C.X线钡餐检

在1：500000的地图上，实地距离为20千米的两城市在图上的距离是（　　）

A．5厘米

B．4厘米

C．3厘米

D．2厘米

能调节十二经气血，主生殖功能的经脉是（）。

A.督脉

B.带脉

C.任脉

D.冲脉

E.阴维脉

Each Party shall provide the same care to avoid disclosure or unauthorized use of the other Party’s Confidential Information as it provides to protect its own similar proprietary information. Confidential Information must be kept by the recipient in a secure place with access limited to only such Party’s employees or agents who need to know such information for the purpose of this Contract and who have similarly agreed to keep such information confidential pursuant to a written confidentiality agreement which reflects the terms hereof. The obligations of confidentiality pursuant to this Article shall survive the termination or expiration of this Contract for a period of five (5) years.

下列定义变量的语句中错误的是______。

A) int_int；
B) double int_；
C) char for；
D) float US$

从事脚手架搭设的人员应该佩戴哪些防护用品？