题目

如图所示是小明和小芳“探究串联电路中电压的关系”的实验电路图． （）请将实验步骤C补充完整．实验步骤：A．按图所示正确连接好电路．B．将滑片移到适当位置，用电压表测出定值电阻两端的电压；C．____________________________________；D．保持滑片不动，用电压表测出、两点之间的电压；E．移动滑片的位置，重复步骤、、两次．（）小明测电阻两端的电压时，电压表示数如图乙所示，此时两端的电压为_________．（）讨论交流：①若小明在实验过程第三部分：阅读理解（共两节，40分）第一节（共15小题；每小题2分，共30分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。AThe Hearst Castle Hearst Castle is a palatial park on the central California coast and a National Historic Landmark．It was designed by architect Julia Morgan for William Randolph Hearst from 1919 until 1947．In 1957 , the Hearst Coiporation donated the fortune to the state of California．Since that time it has been maintained as a state historic park where the estate and its considerable collection of art and antiques are open for public tours．Despite its location far from any urban center, the site attracts roughly one million visitors per year．Guided Tours There are several tours which highlight various parts of the castle and gardens．●Tour One is recommended for first time visitor．It now includes the movie, Hearst Castle Building the Dream．●Tour Two gives visitors a closer look at the main house's upper floors, Mr．Hearst's private suite, the libraries, and the kitchen．●Tour Three looks at the Castle's North Wing, guest rooms and guest house Casa Del Monte．●Tour Four features the impressive gardens and grounds, the largest guesthouse, the wine basement, and the Hidden Terrace．●The evening tour is a special tour that allows visitors to experience the Castle at night as one of the Hearst's own visitors might have．Ticket Prices Hearst Castle accepts VISA, MasterCard, American Express and Discover．Free day use parking is available for automobiles, motorcycles, tour buses and recreational vehicles．TOURSADULTAges 6 – 17Experience Tour$24 $12Tours 2, 3 or 4$ 24$ 12Evening tour$30$15       * Children under 6 are free when accompanied by a paying adult．Reservation Information While tickets may be purchased at the Visitor Center upon arrival, tour reservations are strongly recommended and may be reserved online now or by calling 1 - 800 - 444 - 4445, see below for times．Reservation Call Center HoursDatesMonday-FridaySaturday-SundayMarch-September8AM to 6PM8AM to 6PMOctober-February9AM to 5PM9AM to 3PM       Visit www．hearstcastle．org for more information．56．Who does the Hearst Castle belong to at present? A．William Randolph Hearst．    B．Julia Morgan． C．The state of California． D．The Hearst Corporation．57．If you are quite interested in wine, which tour will you choose? A．Tour One．     B．Tour Two．          C．Tour Three．   D．Tour Four．58．If a young couple take Tour One with their 5-year-old son, how much will they pay for the tickets? A．36． B．60．       C．48． D．75．59．Which of the following is the available time to book tickets by phone? A．At 8 AM on Monday in February．       B．At 9 AM on Sunday in March． C．At 7 PM on Friday in September．       D．At 6 PM on Saturday in October．