卷圆机正常停机时应按（）停止设备。
A、停止按钮
B、急停按钮
C、复位按钮
D、空气开关按钮
参考答案：A
—I wonder＿＿＿ like to be an astronaut(宇航员).
—I don’t know, but I imagine it’s exciting.
A．what is it
B．what it is
C．whether is it
D．whether it is.
流行
