三个最大值相等,角频率相同,彼此互差90度的电动势叫做三相对称电动势。
参考答案:错
解析:三个最大值相等,角频率相同,相位互差120度的电动势叫做三相对称电动势。
组织体能训练时,要遵循体能训练的内在规律,加强体能训练的()。
A、计划性
B、安全性
C、实效性
D、科学性
When you open a file or run a program in a computer, a window appears on the desktop of your computer. The (67) of the window indicates which program you are currently working in arid its color will become blue if a window is active. When you click on The (68) , the window disappears and appears as a button on the taskbar. Clicking on a button in (69) will invoke a specific command.
A.maximize button
B.restore button
C.close button
D.minimize button