钢筋混凝土预制板在安装前，应先在墙上铺设( )，俗称坐浆。
A．水泥砂浆 B．石灰砂浆 C．混合砂浆 D．建筑砂浆
参考答案：A
They are talking about the movie __they watched yesterday
A．/
B．whose
C．what
D．whom
软组织急性扭伤24h内首选的物理治疗是
A．超短波
B．热敷
C．冷敷
D．调制中频电
E．红外线
