题目

阅读理解 Yellowstone National Park.☞文章内容an easy day hike or boat trip can turn into a battle for survival. Grown-ups are often surprised by how well they remember something they learned as children but have never practiced ever since. A man who has not had a chance to go swimming for years can still swim as well as ever when he gets back in the water. He can get on a bicycle after many years and still ride away. A mother who has not thought about the words for years can teach her daughter the poem that begins Twinkle, twinkle, little star or remember the story of Cinderella or Go 用等高线反映一特定岩层顶面起伏形态的构造 图称为构造等高线图。这种构造图定量地、醒目地 反映了地下构造，特别是褶皱构造形态。这是油气 田、煤田和一些层状矿床的勘探和开采中经常编绘 的一种重要图件。读图4“某背抖构造岩层顶面标 高（海拔高度）变化示意图”，完成8-9题。 8. 10孔的孔深可能是   A. 245米　B. 300米　C. 345米　D. 355米 9.该背斜构造脊线大致经过的孔的位置是 A. 12－11－6 　B. 10－9－7 C. 12－10－9 　　D. 11－9－7