生产类型按接受任务的方式划分有存货型生产类型和（）。
参考答案：订货型生产类型
Everyone knows that________ is dangerous to play with fire, but________ is difficult is to prevent children from playing with fire.
A．it; what
B．what; what
C．what; it
D．it; it
湖北民歌《龙船调》是一首（）唱歌曲。
A.齐
B.对
C.重
D.独
