铁路通车后，若乘火车由北京至拉萨，沿途依次出现的地理事物排列正确的是
A．铁路线：京九线--陇海线---兰青线---青藏线。
B．旅游景点：长城、龙门石窟、秦陵兵马俑、敦煌石窟
C．干湿地区：半湿润地区一半干旱地区--干旱区---半干旱地区---湿润区
D．地形区：华北平原、渭河平原、昆仑山、唐古拉山、冈底斯山
答案：A
本题考查我国的区域地理。从京九线南线，在商丘转陇海线；至兰州转兰青线；至西宁转青藏线，A正确；敦煌石窟位于甘肃省西部，北京到拉萨沿途不经过，B错误；从兰州的干旱地区到拉萨的湿润地区之间应经过半干旱和半湿润地区，C错误；昆仑山脉位于新疆与西藏之间，没有经过，D错误。
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| Last night I was driving from Harrisburg to Lewisburg, a __1__ of about eighty miles.It was late and I was in a hurry.However, if anyone asked me how fast I was __2__, I'd say I was not overspeeding.Several times I got __3__ behind a slowmoving truck on a narrow road, and I was holding my fists tightly with _4__. At one point along an open highway, I __5__ a crossroad with a traffic light.I was alone on the road by now, but as I __6__ the light, it turned red and I braked to a stop.I looked left, right and behind me. Nothing.Not a car, no suggestion of headlights, but there I sat, waiting for the light to __7__, the only human being for at least a mile in any __8__. I started __9__ why I refused to run the light.I was not afraid of being __10_, because there was obviously no policeman around, and there certainly would have been no __11__ in going through it. Much later that night, after I __12_ a group of my friends in Lewisburg and climbed into bed near midnight, the question of why I'd stopped for that light __13__ me, I think I stopped because it's part of a contract (合同) we all have with each other.It's not only the __14__, but it's an arrangement we have, and we trust each other to __15__ it: we don't go through red lights.Like most of us, I'm more likely to be __16_ from doing something bad by the social convention that __17_ it than by any law against it. It's amazing that we ever __18__ each other to do the right thing, isn't it? And we do, too.Trust is our __19__ preference. I was so __20__ of myself for stopping for the red light that night. | ||||
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