治疗上消化道出血应选用的药物是 A．去甲肾上腺素 B．多巴胺 C．麻黄碱 D．肾上腺

Most American families are smaller than the families in other countries. They have one or two parents and one or two children. Children in the US will leave their parents’ home when they grow up. They usually live far from their parents because they want to find good jobs. They often write to their parents or telephone them. And they often go to visit their parents on holiday. Parents usually let their children choose their own jobs. Americans think it important for young people to decide their lives by themselves. Children are asked to do some work around their house. And in many families, children are paid for doing some housework so that they learn how to make money for their own use.

小题1:There are _____ people in most American families.

A．1—2

B．2---4

C．3---4

D．4---6小题2:When children grow up, they leave their parents’ home to _____.

A．get married

B．find good jobs

C．be free

D．study小题3:They visit their parents ______

A．on weekdays

B．at weekends

C．at any time

D．on holiday小题4:Which of the following statements is wrong?

A．Children have the freedom to choose their own jobs.

B．Parents don’t ask their children to do housework.

C．Parents think it important for children to make their own decision.

D．When children grow up, they usually live far away from their home.小题5:Some parents pay their children for doing housework because ______.

A．children can learn how to make money for themselves.

B．their children asked them to do so

C．they are rich

D．the children work hard

— Can you _____ your little brother? I'm busy now. 

— OK. I'll do it right now. [ ]

A. wear

B. put on

C. dress

D. in

18的因数有______，它的最小倍数是______．

某工业企业年末应收账款占总资产的比重为60%，年度应收账款周转率为0.45次。在不考虑其他因素影响的情况下，下列各项中，能够说明上述有关应收账款指标反映的内容是( )。

A．坏账损失的比重较大

B．资金周转紧张

C．货币回笼较慢，资产结构不合理

D．销售业绩不佳

减少或消除生产过程中的危险、危害因素，要求对原有的落后工艺和设备有计划地进行改造，不断提高生产设施的安全性及（）。

A.有效性和可靠性

B.适应性和有效性

C.稳定性和可靠性