电动机在（）、额定电压、额定频率下转子每分钟的转数称为额定转数。
A、最小容量
B、最大容量
C、额定容量
D、最大排量
参考答案：C
The Binary Ice Cream Shoppe sells two flavors, vanilla and chocolate. On Friday, the ratio of vanilla cones sold to chocolate cones sold was 2 to 3. If the store had sold 4 more vanilla cones, the ratio of vanilla cones sold to chocolate cones sold would have been 3 to 4. How many vanilla cones did the store sell on Friday ？（）
A.32
B.35
C.42
D.48
E.54
BG008电动机失压或欠电压保护以及制动或反转控制应该使用（）继电器。
A.电压
B.电流
C.中间
D.时间
