常用油浸式配电变压器的电压调整范围为()。
A、±2×1.5%
B、±2×2.5%
C、±2×5%
D、±2×3.5%
参考答案:B, C
Mothers holding jobs outside the home should have ________ schedules to make it easier to care for their children.
A.frequent
B.fluent
C.flexible
D.smooth
类Test定义如下,将下列哪个方法插入行③处是不合法的 ① public class Test { ② public float Method(float a,float b) { } ③ ④ }
A. 快捷菜单中只有条形菜单
B. 快捷菜单中只有弹出式菜单
C. 快捷菜单不能同时包含条形菜单和弹出式菜单
D. 快捷菜单能同时包含条形菜单和弹出式菜单