当汽压升到0.1~0.15MPa时,应()。 A.冲洗压力表存水弯管 B.冲洗水位表 发布时间:2017-08-12 18:27 │ 来源:www.tikuol.com 题型:单项选择题 问题: 当汽压升到0.1~0.15MPa时,应()。A.冲洗压力表存水弯管B.冲洗水位表C.排汽D.给水和排污
题型:单项选择题 There ______ a football match next week. [ ]A .will have B. is going to have C. is going to be D. was going to be 查看答案
题型:单项选择题 如图所示,AB是一质量为m的均匀细直杆,A端靠在光滑的竖直墙壁上,B端置于水平地面上,杆身与竖直方向夹角为θ,杆与地面的摩擦系数为μ,保持平衡,则此时杆与地面的摩擦力为( )A.mgtgθB.mgsinθC.μmgD.μmg 查看答案