某砂场生产的砂涤受广大客户欢迎，其细度模数为2.9，它属于（）。
A.粗砂
B.中砂
C.细砂
D.特细砂
参考答案：B
From his ______ look, we could see that he hadn’t expected that we could raise such ______ questions to him.
A．confused; confusing
B．confusing; confused
C．confusing; confusing
D．confused; confused
钟面上9点30分时，时针与分钟组成的角最小的______度．
