京广高铁的开通再次掀起了一场高铁与航空之间的“地空对决”。受京广高铁通车影响，部分航班甚至出现了低至1.4折的白菜价。下列图中能够正确反映高铁供给量（Q）和航空票价（P）之间关系的是
答案：C
题目分析：高铁与航空是互为替代品的商品，随着高铁需求的增加，对航空的需求减少，航空票价下跌，C图正确；A显示的是随着高铁需求量的增加，航空票价提高，与题意不符；BD与题意不符。
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| Mr. Dawson was an old bad-tempered man, and everyone in town knew it. Kids knew not to go into his yard to pick apples, because old Dawson, they said, would come after you with his gun. One Friday, 12-year-old Janet was walking out with her friend Amy. They had to 1 Dawson's house, but as they got 2 , Janet saw him sitting on his front porch and suggested they cross over the street. Like most, she was 3 of the old man. Amy said, "Don't 4 ." When they got close enough, Dawson looked up with his 5 frown (皱眉), but when he saw it was Amy, he gave a broad 6 . Amy smiled back and told him that they were going to listen to music. Dawson told them that sounded 7 , and gave them each a(n) 8 . Later, Janet asked Amy, "Everyone says he's the 9 man in town 10 he was so nice to us?" Amy explained that when she 11 started walking past his house, he wasn't very 12 , either, but she pretended he was wearing a(n) 13 smile, so she always smiled. It really took some time 14 he one day half- smiled back. After a while, he started smiling a real smile and then 15 to her. She said he always 16 her an apple now, and was always very kind. In our everyday life we are always very busy doing a lot of things and trying to accomplish so much. It's 30 17 to forget that we can bring 18 to ourselves and others. Giving a smile takes so little 19 , but few people are aware of that. Please do remember after a while most people can't 20 our sunniness at all. | ||||
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