单项选择题
当异步电机处于发电状态时，其转差率s( )。
单项选择题 涡轮蜗杆式异步电机的润滑油应使用( )。
单项选择题 When local laws governing performance calculation presentation conflict with GIPS, firms that claim compliance with GIPS:
单项选择题 Which of the following statements regarding employee／employer relationships is FALSE?
