走行机构包括哪些?
参考答案:
电动机、联轴器、制动器、减速机、车轮组、走行轮架。
—Is there___________ tea in the cup?
—Yes, there is____________. Would you like___________?
A.some; any; some
B.any; some; any
C.any; some; some
D.some; any; any
离心泵的有效功率反映离心泵的()。
A、输入功率
B、做功能力
C、消耗功能力
D、内功损失