[单项选择]Manufacturing is Canada's most important economic activity. It ( ) more than half the value of all Canadian production. A. accounts for B. amounts to C. takes up D. turns out
参考答案:A 答案解析:
account for“说明(原因);(数量上)占(多大比例,百分比等)”。如:The hilly area accounts for one third of t
第29题: [单项选择]进行字符串比较时,使命令:"我们大家"="我们",结果为逻辑假的设置是( )。 A. SET EXACT ON B. SET EXACT OFF C. SET COLLATE TO "Machine" D. SET COLLATE TO "Stroke" 参考答案:A 答案解析:[解析] 在用单等号运算符(=)比较两个字符串时,运算结果与SET EXACT ON | OFF的设置有关。 ·ON先在较短字符串的尾部加上若干个空格,使两个字符串的长度相等,然后再进行精确