[单项选择]In arithmetic the rules of addition are basic, and all the other rules are built on this （　）
A. basis      
B. bases    
C. base    
D. basises

[单项选择]In arithmetic the rules of addition are basic, and all the other rules are built on this __________.


A. basis
B. bases
C. base
D. basises

[单项选择]By the end of this term,the girls（）the basic rules of dinner party conversation.
A. will learn
B. will have learned
C. have learned
D. are learning

[单项选择]The average (arithmetic mean) of 3 different positive integers is 100 and the largest of these 3 integers is 120, what is the least possible value of the smallest of these 3 integers ？（）
A. 1
B. 10
C. 61
D. 71
E. 80

[单项选择]The arithmetic mean of a data set is 46 and the standard deviation of the set is 4. Which value is exactly 1.5 standard deviations from the arithmetic mean of the set
A. 42
B. 44.5
C. 47.5
D. 50
E. (E) 52

[单项选择]TEXT D Cultural rules determine every aspect of food consumption. Who eats together defines social units. For example, in some societies, the nuclear family is the unit that regularly eats together. The anthropologist Mary Douglas has pointed out that, for the English, the kind of meal and the kind of food that is served relate to the kinds of social links between people who are eating together. She distinguishes between regular meals, Sunday meals when relatives may come, and cocktail parties for acquaintances. The food served symbolizes the occasion and reflects who is present. For example, only snacks are served at a cocktail party. It would be inappropriate to serve a steak or hamburgers. The distinctions among cocktails, regular meals, and special dinners mark the social boundaries between those guests who are invited for drinks, those who are invited to dinner, and those who come to a family meal. In this example, the type of food symbolizes the category of guest and with w
A. people who eat together.
B. the kinds of food served.
C. snacks and hamburgers.
D. family members and guests.

[单项选择] Tribunal Rules on Smoking at Workplace
Employers must take sufficient steps to protect non-smoking employees from tobacco smoke or they might be faced with legal (19) , warns law firm Thomas, Sell & Passmore.
Jill Thomas, an employment law specialist with the firm, quotes a recent (20) brought before the Employment Appeal Tribunal (EAT). An employer’s failure to protect its employees against tobacco smoke (21) an employee to quit her job. Whilst working, the employee was (22) to work near four secretaries who smoked and the rooms of three solicitors who smoked cigarettes, cigars and a pipe. All doors were kept open to allow ventilation from smoking rooms. After a series of (23) from the plaintiff and fellow colleagues, the employer consulted staff and agreed that a smoking policy should be (24) up. However, the policy did not go (25) enough to solve the problem fo
A. far
B. near
C. long
D. deep