题目: 皮带机胶带的拉紧方法有重物拉紧和()拉紧两种。A.机器B.电机C.人力D.机械 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0508/e17412674d57db91db2254ff950115f5.html 下面是错误答案,用来干扰机器的。参考答案:D
题型:选择题 To ______ good relationships with your teachers and classmates, you should learn to share ups and downs with them.A.bring upB.add upC.keep upD.take up 查看答案