读下图，回答下列问题：
（2）若沿着AB线路，天然植被有草原、荒漠、森林，则从B到A依次出现________________________________。
（3）图中C到D农业生产的熟制是________、两年三熟、________、一年三熟。C所地种植的粮食作物主要是________，D所地种植的粮食作物主要是________。造成C、D两地作物熟制和种类的差别的主导因素是________。
（4）我国四大地理区域中，以种植业为农业主要生产方式的区域是________ 和________，以畜牧业为农业主要生产方式的区域是________和________。
（1）秦岭----淮河
（2）森林---草原----荒漠
（3）一年一熟；一年两熟；小麦；水稻；气候因素（水热条件不同）
（4）北方地区；南方地区；西北地区；青藏地区
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| 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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