题目内容

单位时间内导线流过的电荷数量为电流强度。()

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Question 5
In January, 1992, Wang rented a house for three years at a monthly rent of ＄1,000. Wang became unemployed in August, 1992 and wanted to move out. Jone then orally agreed to reduce the monthly rent to half. In January, 1993 Wang was informed to pay the amount of rent he had paid before.
Could Wang insist on paying the half rent until expiration of the contract？
Give reasons for your answer.

在自动调节中，PID调节器主要靠比例作用避免过分振荡，靠积分作用消除静态偏差，靠微分作用减少动态偏差。()

Question 3
John wrote to Mary asking "Will you sell your second-hand car？ Please tell me your lowest price." Mary replied in a letter: "The lowest price for my used car is ＄2,000." John then sent the second letter to Mary saying that he agreed to buy the used car for ＄2,000. But before Mary received the letter from John, Mary sold her used car to David.
Can John sue Mary to enforce the contract？

引起自动调节系统被调量波动的因素叫干扰。()