图15为某月某日气压（单位百帕）形势分布图，联系所学回答问题：
（1）说明该日内蒙古河套平原的天气状况。
（2）据图，指出该日我国大陆沿海航线中，航运安全隐患较大的航段，并简析原因。
（3）比较丙、丁两地风力的大小，并说明原因。
（4）指出甲、乙两地的板块边界类型，及相应的地貌。
（1）阴雨天气。因受低压或气旋控制。
（2）上海至广州（在两地间的某段也可）。
该航段所在海域等压线较密，水平气压力大 ，风大浪高。
（3）丙地风力大。因两地等压线疏密相同，但丙地（位于海洋）摩擦力较小，丁地（位于陆地）摩擦力较大。
（4）都是消亡边界。甲为山脉（高原），乙为海沟。
| 完形填空 Although in 1947 we were still very new to the atomic (原子的) age, we knew about mushroom clouds. A huge crack (裂缝) spread across the library wall upstairs, sending teachers and __1__ screaming down the hall. Had a new world war started? Palefaced, our young science teacher quickly__2__us for a fire drill. We huddled (卷缩) in little groups on the beach side of the school grounds and__3__the spreading cloud darken the bright spring sky. Rumors flew every which way, __4__two hours would pass before we got the full story. One rumor we heard was that the Texas City Monsanto Chemical plant had__5__； children whose parents__6__ there began to cry. I__7__-that was where my father was working that day. The school bell called us back inside, and we were dismissed (解散) to__8__our way home the best way we could. I'd walked a quarter of the threemile trip to my home__9__a car horn frightened me to __10__. My Uncle Barney__11__alongside me in his old Ford. The instant I saw him, I knew my father __12__. Otherwise, Papa would have__13__for me himself. As if in slow motion from a great distance, Uncle Barney motioned for me to__14__. Numb with grief, I crawled into the back__15__. I barely took notice of the man sitting there, and didn't recognize him until he __16__me. When Papa put his strong arms around me, I forgot for a moment that Cherokees aren't supposed to__17__. Many of my fellow students lost their__18__in the explosion. Tragedy would one day come to our __19__, as it inevitably (不可避免地) comes to all, but one day Texas City blew up, it miraculously (奇迹般地) passed us by. Because he lost his keys on that April morning, as he explained, my father lived for__20__32 years-we were to have a second lifetime forever. | ||||
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