第26题: [单项选择]Which of the following will not result in random fluctuation A. Unreliable equipment. B. Cash input. C. Management skills. D. Earthquake. 参考答案:B 答案解析:根据第二段中第三句“Random fluctuations can arise from external disruption(fire，floods or lightning，for exampl
第29题: [单项选择]Businessmen make most of their income from profit ______ by producing and selling products. A. earning B. is earned C. earn D. earned 参考答案:D 答案解析:[解析] 本题考查的是过去分词作定语的用法。本题中的名词中心词profit和earn的关系是被动的关系，因此需要使用过去分词作名词profit的定语，故选项D为正确答案。 [避错指南] A项
第32题: [单项选择]The popularity of photography has not only revolutionized the way people communicate, but it has A. benefited the economy to a large extent. B. increased the efficiency of information conveyance. C. improved the understanding between human beings. D. All of the above. 参考答案:D 答案解析:[解析]摄影的普及不仅改变了人们的交流方式，也：选项A：促进经济大幅增长。正确，第四段最后一句：The impact of the sale of photographic equipment on
第33题: [单项选择]The main purpose of the research is________. A. to make preparations for a new publication B. to learn how couples spend their weekends C. to know how housework is shared D. to investigate what people do at the weekend 参考答案:A
第35题: [单项选择]在窗体上画一个命令按钮，然后编写下列程序 Private Sub Command3_Click（ ） Tcl 2 Tcl 3 Tcl 4 End Sub Sub Tcl(a As Integer) Static x As Integer x=x+a Print x; End Sub 程序运行后，单击命令按钮，输出结果为 A. 2 3 4 B. 2 5 9 C. 3 5 4 D. 2 4 3 参考答案:B 答案解析:[解析] 在过程Tcl中，将Integer型变量x定义为静态变量(Static)，Static语句的格式与Dim语句完全一样，但Static语句只能出现在事件过程，Sub过程或Function过程中，
