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单项选择题

以下为描述LCD液晶显示器显像的是（   ）
A、通过电子轰击荧光屏发光。
B、高压电离惰性气体发出紫外线，紫外线照射荧光粉发光。
C、图像信号控制液晶的扭转，从而控制光通过红绿蓝滤色片的亮度。
D、图像信号控制有机材料上发光的强度。

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关于无黏结预应力钢筋混凝土梁的优点，下列( )说法是不正确的。
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Sometimes I feel that being the mother of three small children is like operating a large circus(马戏团).（21）afternoon last week, my three sons playing peacefully in the back yard(院子),（22）the ball from one to another. I jumped at the chance to talk to one of my friends（23）the phone, but before I（24）to the phone, I could tell the boys had begun to quarrel with each other about something. I rushed out to（25）peace, but before I got there Charles had（26）a rock at Mark, and hit him in the eye. By the time I got to the back yard, they had begun to（27）about this. Even David, the oldest boy, who won′ t usually fight with anybody about（28）, was involved(卷入,). First, I（29）them stop fighting, and then I examined Mark′ s eye. I decided that it wasn′t going to develop into a black eye, but I felt that they should（30）at least a little for（31）they had done "I′ m going to（32）to your father about this when he comes home for tomglat, said. "He and I will think of how to punish you. "Things were（33）quiet after that about half an hour, and then Charles（34）a glass in the kitchen, and at almost the same（35）, Mark fell out of the apple tree.
第（26）题选
A.thrown
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单项选择题
已知RLC串联谐振电路，已知L=2mH，发生谐振的角频率ω0=1000rad/s，则电容C=_____μF。
A、1/2
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