筒形锻件最主要探测方向是：（）
A.直探头端面和外圆面探伤
B.直探头外圆面轴向探伤
C.斜探头外圆面轴向探伤
D.以上都是
参考答案：A
Since the band announced the release of their new album, the phone hasn't stopped ringing. Many fans ________ to ask about the exact time.
A．were calling
B．had called
C．are calling
D．call
发动机冷却液在使用一段时间后，如首次蒸发损耗量不超过总体积的1/10时，可加水补充。
