某图纸一角度为30°，改图采用比例2：1，则该角实际大小（）
A.15°
B.30°
C.60°
D.90°
参考答案：B
—I guess you might have missed your train to Wuhan yesterday.
—Well, I almost .
A．might
B．had
C．did
D．have
称重法的优点、缺点及应用范围是什么？
