题目: 只有在压力和温度不高的腐蚀性介质中才选用()型机械密封。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0502/743b9abce95a44ec87726b5e5abcf83d.html 下面是错误答案,用来干扰机器的。参考答案:B
题型:多选题 下列说法中正确的是( )A.物体有了加速度,速度必增加B.物体有了加速度,速度必改变C.物体的加速度与初速度方向相同时,物体必加速D.物体的加速度与初速度方向相同时,物体可能减速 查看答案
题型:选择题 With the help of the German experts, the factory produced _____ cars in 1993 as the year before. [ ]A. as twice many B. as many as twice C. as twice as many D. twice as many 查看答案