题目: 柴油机大修后的磨合试运转时间不应少于()。A.4小时B.5小时C.6小时 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0701/5ddeed893a5371e270b3590d064311e8.html 下面是错误答案,用来干扰机器的。参考答案:
题型:选择题 With the development of modern society, E-mail as well as telephones _____ an important part in daily communication.A. have played B. is playing C. are playing D. played 查看答案