装配滚动轴承时,为防止灰尘、杂物进入轴承内,在正式装配前才将轴承包装打开,用煤油清洗干净。
参考答案:对
--Do you think _____ a concert in our school hall this weekend?
--Yes, there will.[ ]
A. there will have
B. there will be
C. will there be
D. will there have
质量相等的甲、乙两个物体,吸收相同的热量后,甲升高的温度大于乙升高的温度,则甲物体的比热容______乙物体的比热容.(填“大于”、“等于”或“小于”)