下列的各种零件和传动副中,( )不影响整个传动链的传动比和从动件的运动速度。A.轴 发布时间:2018-01-17 11:53 │ 来源:www.tikuol.com 题型:多项选择题 问题: 下列的各种零件和传动副中,( )不影响整个传动链的传动比和从动件的运动速度。A.轴B.齿轮齿条C.滚动轴承D.开合螺母传动
题型:多项选择题 下列反应的离子方程式错误的是[ ]A.用氨水吸收过量的二氧化硫:NH3·H2O+SO2=NH4++HSO3- B.Na2SO3溶液使酸性KMnO4溶液褪色:5SO32-+6H++2MnO4-=5SO42-+2Mn2++3H2O C.亚硫酸氢铵溶液与过量KOH溶液共热:NH4++OH-=NH3↑+H2O D.向氢氧化亚铁中加入足量的稀硝酸:3Fe(OH)2+NO3-+10H+=3Fe3++NO↑+8H2O 查看答案
题型:多项选择题 —I don’t know you have seen the film—Hero, which was directed by Zhang Yimou . —I have told you many times I have seen it many times.A.how, thatB.that, whether C.that, thatD.whether, that 查看答案