BG35型离心旋涡泵上有一对(),一只装在水泵轴上,一只装于水环泵轴上。 A.叶轮 发布时间:2018-09-03 14:17 │ 来源:www.tikuol.com 题型:单项选择题 问题: BG35型离心旋涡泵上有一对(),一只装在水泵轴上,一只装于水环泵轴上。A.叶轮B.吸入口C.凸轮D.摩擦轮
题型:单项选择题 I like ______. Would you like ______ with me this afternoon? [ ]A. swimming, swimmingB. to swim, to swim C. swimming, to swimD. to swim, swimming 查看答案