题目

如图，⊙P与轴相切于坐标原点O（0，0），与轴相交于点A（5，0），过点A的直线AB与轴的正半轴交于点B，与⊙P交于点C． （1）已知AC=3，求点Ｂ的坐标；               （2）若AC=, D是OＢ的中点．问：点O、P、C、D四点是否在同一圆上？请说明理由．如果这四点在同一圆上，记这个圆的圆心为，函数的图象经过点，求的值（用含的代数式表示）．                 Section B Directions: Read the following four passages. Each passage is followed by several questions or unfinished statements. Choose the one that fits best according to the information given in  the passage you have just read. (A)        Matsushita, the world’s largest provider of consumer electronics, has decided to move in on Hollywood. Last weekend, Matsushita company leaders met with movies VIPs from MCA, Inc., the entertainment community that produced the movies as “Jaws” and “E.T. the Extra-terrestrial”. If the negotiations are successful, Matsushita will pay somewhere between $6 billion and $7.5 billion for MCA, by far the largest U.S. buying by a Japanese company.        The deal is larger than last year’s $5 billion buying of Columbia Pictures by Matsushita’s competitor, Sony Corporation. The movement by the Japanese companies shows Tokyo’s growing interest in the entertainment world. It is surprising for both sides of the Pacific Ocean. Why does a disciplined, no-nonsense nation like Japan want to get into show business? The answer is quite simple: To make money. Japanese corporation leaders feel the global potential of the entertainment business and recognize that there is an increasing market for movies and television in the rapidly industrializing world. 1.    The movement of buying American entertainment companies by the Japanese shows       that____     _.       A. American movies are better than Japanese       B. Japan has growing interest in the entertainment world       C. Japanese market is larger than American market       D. Japanese people are richer 2.    A disciplined nation like Japan wants to get into show business because _____       A. they want to make money       B. they want to learn from American people       C. they want to entertain their people       D. they want to win in the competition 3.    Matsushita would pay ______ for MCA.       A.$5 billion       B.$6 billion       C.$7.5 billion       D. Somewhere between $6 billion to $7.5 billion