药物在应用前或制成各种剂型以前必要的加工处理过程称为（） A.修治 B.水制 C.火

点P是等边三角形ABC所在平面上一点，若P和△ABC的三个顶点所组成的△PAB、△PBC、△PAC都是等腰三角形，则这样的点P有（  ）个。

鸟类的枕骨大孔在背面。（）

— I phoned you yesterday morning. A girl answered, but I didn’t recognize the voice.

— Oh, it ____ my younger sister. She was in my room at that moment.

A．must have been

B．should have been

C．could have been

D．may have been

喷涂聚脲防水涂料产品固含量很高，国标中规定：Ⅰ型产品≥（），Ⅱ型产品≥（）。

楼梯踢脚线套用踢脚线子目，乘以系数（）。

A.1-1

B.1.15

C.1.2

D.1.25