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固有频率(名词解释)
【参考答案】
当激振力的频率与机械或构筑物的固有频率一致时,就会发生共振,振幅扩大,作用于基础的力增大。因此,固有频率也称共振频率。
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I ____ to repair the car while you were watching TV.
A、try B. tries C. trying D. was trying
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God decided to allow his only son, Jesus Christ, to be born to a human mother and live on earth so that ______.()
A、people could understand God better
B、people could learn to love God
C、people could learn to love each other more
D、all of the above
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