单项选择题某构造盆地,在高水头补给情况下,地下水充满于两个隔水层之间。该地下水属于 A、上层滞水 B、潜水 C、承压水 D、包气带水
单项选择题The following main points are arranged in ( ) order. “I. The top layer of the earth is a rocky “skin” called the crust. II. Beneath the crust is a thick layer of rock called the mantle. III. The next lower section is a mass of molten rock called the outer core. IV. At the center of the earth is a solid mass called the inner core.” A. topical B. spatial C. chronological D. problem-solution