依托若干企业，形成互相提供信息、扩大销售和服务范围为主的企业集团。这是企业集团的（）

下列物质中，在常温常压时呈气态的是(  )

A．乙炔

B．苯

C．乙醇

D．四氯化碳

个人客户经理若长期离岗，必须本人通过()功能工作移交。

A、客户经理工作托管

B、优质客户调整

C、优质客户状态调整

D、客户经理工作移交

妊娠合并肝炎产后的正确处理是（）

A.四环素预防感染

B.母乳喂养

C.注射维生素K预防出血

D.产妇可回普通病房

E.产妇烦躁时用氯丙嗪镇静

标准体重指标怎么计算？

An analyst conducted a significance test to determine if the relationship between two variables was real or the result of chance. His null hypothesis is that the population correlation coefficient is equal to zero and his alternative hypothesis is that the population correlation coefficient is different form zero He developed the following information:（）

Value of the test statistic	2.8092
Critical value at the 0.05 significance	1.96
Critical value at the 0.01 significanae level	2.58

The analyst conducted a:

A. one-tailed test and can reject his null hypothesis. 

B. two-tailed test and can reject his null hypothesis. 

C. one-tailed test and cannot reject his null hypothesis.