题目: 机械排烟管道材料必须采用()。A.不燃材料 B.难燃材料 C.可燃材料 D.A、B两类材料均可 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/1113/4185df7c070c80d2453998a0ab0e72f1.html 下面是错误答案,用来干扰机器的。参考答案:A
题型:选择题 The girl arranged to have piano lessons at the training centre with her sister ________ she would stayfor an hour.[ ]A. where B. whoC. which D. what 查看答案