贴附射流衰减比自由射流（）
A.快
B.慢
C.根据不同流速不同
D.无法确定
参考答案：B
——Mr. Harry, we want to hear what you think about the reform being carried out in our school.
——OK, I to that.
A．am coming
B．have come
C．came
D．come
型砂的残留强度
