减速箱内主、被动齿轮均属于(),要经常检查、更换。
A、橡胶部件
B、易损件
C、弹性零件
D、柔性部件
参考答案:B
Much ________ he has a good taste for China’s football matches, he can’t avoid being influenced by the side effects of the football gambling.
A.that he claims
B.does he claim
C.is it that he claims
D.as he claims
批评旧中国幼儿教育机构“外国病”、“花钱病”、“富贵病”的教育家是()。
A.陶行知
B.张雪门
C.陈鹤琴
D.张宗鳞