下列物质用途与化学性质无关的是[ ] A．二氧化碳用作气体肥料 B．生石灰用作食

Ⅶ.短文改错（每小题1.5分，共15分）

When tea and coffee were introduced to Europe in 18 th                  1.        

century, people thought they were harmful. But the King of                    2.        

Swede decided to find out whether it was true .It was                       3.        

happened that there had two brothers in prison                                4.        

at the time. The King ordered one of them drink tea                         5.        

every day and the other coffee. Both of them have lived                   6.         

many years with no problem. At the end the one who                       7.        

drink coffee every day died at the age of 83 and the                         8.        

other lived even long. Because of this, Swede is                              9.        

one of the countries which much tea and coffee are drunk today.              10.        

外加剂中固形物含量的测定是取（）试验结果的平均值。

A.一次

B.二次

C.三次

D.四次

旅客购买车票后遇票价调低时，可在原购票窗口退还高出的票款。（部竞赛题）

类风湿性髋关节炎与髋关节结核大多没有

A．ThOmas征阳性

B．X线摄片见骨质疏松，关节肿胀

C．血沉增快

D．最后发展成关节骨性强直

E．均可发生病理性半脱位

电能的生产.输送和消费有以下区别于其它工业的技术特点，其中不正确的是（）

A.电能不能大量存贮，电能的生产.的送.分配和消费实际上是同时进行的

B.电力系统的暂态过程非常短促

C.电能与国民经济各部门和人民日常生活的关系极为密切

D.电力系统中的发电厂在任何时候生产的电能必须大于该时刻用电设备消费的电能与输送和分配环节中的损耗电能之和