题目内容

I've been a student there for nearly two and _______ half years.

A. a
B. an
C. the
D. /

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It took me ________ to find out the key to the drawer.

A. one and half hours
B. one and a half hours
C. one and a half hour
D. one and half hour

#includemain( ){ char ch;ch=getchar( );switch(ch){ case ‘A’ : printf(“%c”,’A’);case ‘B’ : printf(“%c”,’B’); break;default: printf(“%s\n”,”other”);} }当从键盘输入字母A时，运行结果为：

#include main( ){ int a=1,b=0；scanf(“%d”,&a);switch(a){ case 1: b=1；break；case 2: b=2；break；default : b=10；}printf("%d ", b)；}若键盘输入5，运行结果为：

采用酸度计测定一系列同一种电解质溶液的 pH值时，测定的顺序按浓度由稀到浓或由浓到稀所得到的结果是完全相同。

A. 对
B. 错