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Đồ thị biểu diễn sự phụ thuộc vào thời gian của điện tích ở một bản tụ điện trong mạch dao động LC lí tưởng có dạng như hình vẽ.Phương trình dao động của điện tích ở bản tụ điện này là – Học trắc nghiệm
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Read the following andmark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Harvard University, today recognized as part of the top echelon of the world’s universities, came from very inauspicious and humble beginning.This oldest of American universities was founded in 1636, just sixteen years after the Pilgrims landed at Plymouth. Included in the Puritan emigrants to the Massachusetts colony during this period were more than 100 graduates of England’s prestigious Oxford and Cambridge universities, and these universities graduates in the New Word were determined that their sons would have the same educational opportunities that they themselves had had. Because of this support in the colony for an institution of higher learning, the General Court of Massachusetts appropriated 400 pounds for a college in October of 1636 and early the following year decided on a parcel of land for the school; this land was in an area Newetowne, which was later renamed Cambridge after its English cousin and is the site of the present-day university.When a young minister named John Harvard, who came from the neighboring town of Charlestowne, died from tuberculosis in 1638, he willed half of his estate of 1,700 pounds to the fledgling college. In spite of the fact that only half of the bequest was actually paid, the General Court named the college after the minister in appreciation for what he had done. The amount of the bequest may not have been large, especially by today’s standard, but it was more than the General Court had found it necessary to appropriate in order to open the college.Henry Dunster was appointed the first president of Harvard in 1640, and it should be noted that in addition to serving as president, he was also the entire faculty, with an entering freshmen class of four students. Although the staff did expand somewhat, for the first century of its existence the entire teaching staff includes of the president and three The passage implies that ____.
