一种铜和铝的合金重7500克，铜和铝质量的比是2：3。问：这种合金中铜和铝各重多

影响企业工资水平的因素有哪些？企业如何确定其工资水平？如何设计工资等级？

Do you know what the White House is? Perhaps some of you do, while others don’t.

　　The White House is a house in Washington. The president of the U.S.A. lives in it. It's really white. But do you know why the White House is white? The story happened in 1812. That year England was at war with America. The British army got to Washington and set the president's house on fire. In 1814，in order to hide the marks of the fire，the stone walls of the president's house were painted white and it has been the “White House” ever since.

小题1:White House is a house for ___________.

A. the American people.　　  B. the soldiers of U.S.A.

C. the presidents of U.S.A.　  D. the patients of U.S.A.

小题2:England fought with America in ____________.

A．1810

B．1812

C．1814　　　

D．1916小题3:The house is called “White House” because ____________.

A．it's covered with snow

B．the house is very clean

C．the stone walls of the house were painted white

D．they like white color小题4:The White House was painted white because ____________.

A．the house is old

B．the house is new

C．it was once on fire and was with marks

D．they have enough paint小题5:“ever since” means ___________.

A．never

B．once　　

C．from then on　　

D．before

Don't ______ your hope no matter what happens. [ ]

A. write down

B. look for

C. go over

D. give up

治疗等渗性脱水理想的液体是（）。

A.5%碳酸氢钠

B.等渗盐水

C.平衡盐溶液

D.5%葡萄糖

E.小分子右旋糖酐

以下哪种情况是平衡评定的禁忌证（）

A.截肢

B.多发性硬化

C.关节置换

D.严重心肺疾病

E.颅内肿瘤