动力钻具在井口试运转时,必须先开()试运转。A、单泵 B、双泵 C、单双泵交替开 D 发布时间:2019-12-30 01:54 │ 来源:www.tikuol.com 题型:单项选择题 问题: 动力钻具在井口试运转时,必须先开()试运转。A、单泵B、双泵C、单双泵交替开D、没要求
题型:单项选择题 When the young man realized that the police had spotted him, he made () the exit as quickly as possible, only to find that two policemen were waiting outside.A.offB.fromC.towardsD.for 查看答案
题型:单项选择题 就计算机网络分类而言,下列说法中规范的是A.网络可分为光缆网、无线网和局域网B.网络可分为公用网、专用网和远程网C.网络可分为数字网、模拟网和通用网D.网络可分为局域网、远程网和城域网 查看答案