集成运放工作在非线性区的必要条件是开环或引入正反馈,特点是( )和( )。
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电压比较器中集成运放工作在非线性区,输出电压U。只有()或( )两种状态。
运放工作在非线性区时,输出电压不是高电平就是低电平。
A. 对
B. 错
即使在很浓的强酸水溶液中,仍然有OH‒离子存在。
A. 对
B. 错
The British government began to increase the economic exploitation of the colonies to ______________.
A. Gain greater control of the colonies
B. Pay off its debt due to the war
C. Develop more colonies
D. Show its supremacy over the colonies