塑料门窗框与墙体间隙应采用（）弹性材料填嵌饱满，表面应采用密封胶密封。
A．胶粘
B．闭合
C．闭孔
D．封顶
参考答案：C
There are _______ students in this high school. [ ]
A. three hundred of
B. three hundreds of
C. three hundreds
D. three hundred
利益表达
