1. A situation is efficient if a. no change can help some people without hurting others. b. the gain for some people offsets the loss for others. .C. the gain for some people more than offsets the loss to others. d. consumer surplus is maximized. e. producer surplus is maximized

组成:含氧酸根+Mn+,可能还有H+(酸式盐)、OH(碱式盐。酸根中,中心离子通常是高价态的C4+,5+,s6+p,Cr+mn7+等

4-1:(1)()ZnZn2+cd2+cd(+)(2)(-)(C)Fe2+,Fe3+AgAg(+) 4-2根据标准电极电势数据分析,只能选Fe 4-4:(1)E=0.0113V,Pb(+);(2)E=0.0477V

4.1if语句 4.1.1if语句的一般形式 4.1.2if语句的嵌套 4.2 switch语句 4.2.1 switch语句的一般形式 4.2.2 break语句 4.3选择结构程序设计举例

6.1一维数组 6.2二维数组 6.3字符数组与字符串

8.1指针和指针变量 8.2指针与数组 8.3指针与函数

L Matching: (20%) Directions: Read the essay below. The topic sentence of each paragraph is missing. Now look at the topic sentences a, b, c, d and e that followed the essay and match four of them with the paragraph

Directions: Choose the best answer to complete each of the following sentences 1.The assignment for Thursday is to write composition about your hometown A)a five-hundred-words B)a five-hundred-word C)a five-hundreds-word D)a five-hundreds-words

一、单项选择题(在每小题的四个备选答案中,选出一个正确的答案,将其号码填在题干后的括号内,每小题1分共20分) 1.寄生虫与宿主的关系,下列哪项是错误的() A.人是冈地弓形虫的终宿主 B.中华按蚊是马来丝虫的中间宿主 C.野猪是斯氏狸殖吸虫的转续宿主 D.猫是华支睾吸虫的保虫宿主

I. Vocabulary and Structure: (45%) C. reminds meof D. reminds of Direction: Choose the best answer to complete each sentence given