第12题: [单项选择]There are many kinds of metals, (). A. all having its special properties B. each having its special properties C. one has its special properties D. each has its special properties 参考答案:B 答案解析:
each having its special properties“每种(金属)都有自己的特性”,分词独立结构放在句末,进一步补充说明细节情况。
第14题: [单项选择]下列不能正确表示代数式2abcd的C语言表达式是( )。 A. 2*8-*b/c/d B. a*b/c/d*2 C. a/c/d*b*2 D. 2*a*b/c*d 参考答案:D 答案解析:[解析] 本题考查运算符的优先级书写及运算。“*和/”运算优先级相同,据此判断,选项D表示的是2abd/c,而不是2ab/(cd)。