开始工作前，必须按规定穿戴好（）。A、衣物、手套 B、衣物 C、衣物、眼镜 D、防护用品

结果为 a²的式子是（ ）

A．a⁶÷a³

B．a • a

C．（a^--1）²

D．a⁴-a²=a²

完型填空（30分）

完型填空一：

Have you ever had to decide whether to go shopping or stay home and watch TV on a weekend? Now you can do both at the same time. Home shopping television networks have become a __16__ for many people to shop without having to leave their homes.

Some shoppers are tired of department stores and supermarkets — __17__ the crowds, waiting in long lines, and sometimes having slight __18__ of finding anything they want to buy. They’d rather sit quietly at home in front of the TV set and watch a friendly announcer describe a product __19__ a model shows it. And they can shop __20__ the clock, buying something __21__ by making a phone call.

Department stores and even mail-order companies are __22__ to join in the success of home shopping. Large department stores are busy setting up their own TV channels to encourage TV shopping in the future. Customers can ask questions about products and place __23__ all through their TV sets.

Will shopping by television finally take the place of shopping in stores ? Some industry managers think so. __24__ many people find shopping at a __25__ store a great enjoyment. And for many shoppers, it is still important to __26__ or try on dresses they want to buy. That’s why specialists say that in the future, home shopping will __27__ together with store shopping but will never entirely replace it.

16. A. programme                  B. way                C. reason              D. purpose

17. A. fighting                     B. striking             C. treating             D. stopping

18. A. sense                 B. doubt              C. hope                D. feeling

19. A. until                  B. since                C. if                  D. while

20. A. by                   B. around                     C. about               D. to

21. A. suitably                     B. cheaply              C. simply              D. hardly

22. A. nervous                     B. lucky                      C. equal               D. eager

23. A. orders                B. goods                C. books             D. answers

24. A. Then                 B. Yet                  C. However            D. Therefore

25. A. general               B. popular               C. real                D. true

26. A. design                B. make                C. wear                D. touch

27. A. exist                 B. practice              C. follow              D. appear

合作学习是一种以（）为基本形式、系统利用各因素之间的互动、以团体成绩为评价标准、共同达成教学目标的教学组织形式。

A.班级

B.学习小组

C.年级

D.学校

2012年5月8日，王某骑车回家经过一工地时，掉人没有设置明显标志和采取安全措施的坑中，造成骨折。王某于同年6月10日找到建设项目的施工人要求赔偿，遭到拒绝。同年6月13日，王某前往法院起诉，突遭台风袭击，中途返回。下列说法正确的是（）。

A.本案诉讼时效期间于2013年6月10日届满

B.本案诉讼时效期间于2014年6月10日届满

C.王某6月13日的行为引起诉讼时效中断

D.王某6月13日因台风导致无法行使权利，引起诉讼时效中止

测定变量之间相关程度的代表性指标是（）。

A.估计标准误

B.两个变量的协方差

C.相关系数

D.两个变量的标准差