规格用公称通径表示的管子有（）。
A.镀锌钢管
B.不锈钢管
C.铸铁管
D.硬聚氯乙烯
参考答案：A, C, D
Then ____ that the war was over.
A．the news came
B．came the news
C．did the news come
D．did come the news
收录有伊贺，甲贺流的忍术密集是谁？
