问题
单项选择题
斜探头K值的表示式为（）。
A、cos&beta；=K
B、sin&beta；=K
C、tan&beta；=K
D、arctan&beta；=K
答案
参考答案：C
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斜探头K值的表示式为（）。
A、cos&beta；=K
B、sin&beta；=K
C、tan&beta；=K
D、arctan&beta；=K
参考答案：C
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| My mother and I were walking home from a pizza store on a cold December morning. We were 1 warmly and carrying the video that we wanted to watch. I was feeling a little 2 , as I was carrying our shopping bags of snacks and the video. They were so heavy that I decided to 3 some things. So I started to walk towards the garbage can (垃圾桶) when I 4 a poor man walking his 5 out of the restaurant in front of us. He held a paper bag with his 6 hand. He headed over to another nearby garbage can and started looking through it. I 7 felt very guilty (内疚的). I knew this man would take all he could get, 8 I walked up to him and 9 the drink and some snacks over to him. The man, with lines on his face and wrinkles on his forehead, looked up in 10 and took what I gave him. A huge smile 11 across his face and this 12 me to get indescribable satisfaction. I felt I couldn't be 13 with myself, but then he said:"Wow, first someone gives me this sandwich, then this drink, and now some 14 food; this is my daughter's 15 day!" He thanked me 16 and started off on his bike. I even heard him whistling a song as he rode away. I now 17 what is meant by the saying "giving is getting". Everyone in the world needs help, everyone can 18 help and everyone will be helped by showing 19 . The image of that man's happiness caused by my small gift appears in my mind every time I have the 20 to do something nice. | ||||
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