（）是上人屋面的防水保护层做法。
A、绿豆砂保护层
B、浅色反光涂料层
C、地砖块材
D、架空钢筋混凝土板
参考答案：C, D
What is the expectation of overall summer travel this year
A．A 2.5% rise.
B．It would rise along with international tourism.
C．A 28% rise.
D．Patriotism would not be a theme in travel market.
有以下程序： main( ) { char s[]="\n123\\"; printf( % d, % d\n", strlen(s),sizeof(s)); }执行后的输出结果是 ______。
A．赋初值的字符串有错
B．6,7
C．5,6
D．6,6
