多项选择题
A.铁芯B.主磁极C.绕组D.换向极E.换向器
Which of the following can be the best title for the te...
单项选择题Which of the following can be the best title for the text?（）
A.Changesin TraditionB.A NewJob for MenC.Manniesand Women NanniesD.BabyBoys and Their Mannies
拖动液压泵工作的电机功率应比液压泵输出功率（）。A.相等B.小些C.大些D.都可以
单项选择题拖动液压泵工作的电机功率应比液压泵输出功率（）。
A.相等B.小些C.大些D.都可以
What is the text mainly about?（）A.The economic developm...
单项选择题 What is the text mainly about?（）
A.The economic development in Europe．B.The results of a study．C.Living costs outside the euro zoneD.Changes in world currencies．
