下列分项工程中哪一项的权值最小（）
A、裂缝表面封闭
B、体外预应力加固
C、伸缩缝更换
D、裂缝灌胶封闭
参考答案：A
The headmaster asked the pupils __ too late on weekdays. [ ]
A. not get up
B. not to get up
C. don't get up
D. to not get up
字符串常量“ME”的字符个数是 ______。
A．1
B．2
C．3
D．4
