怎么做这道题怎么写

来源：蜘蛛抓取(WebSpider) 时间：2014-06-08 21:14 标签： 一道震惊世界的数学题
这道题怎么做小学生数学竞赛，共20道题，有20分基础分，答对一题给3分，不答给1分，答错一题倒扣1分，若有1978人参加竞赛，问至少有人得分相同。
20+3×20=80,20-1×20=0,所以若20道题全答对可得最高分80分,若全答错得最低分0分.由于每一道题都得奇数分或扣奇数分,20个奇数相加减所得结果为偶数,再加上20分基础分仍为偶数,所以每个人所得分值都为偶数.而0到80之间共41个偶数,所以一共有41种分值,即41个抽屉.……10,所以至少有49人得分相同.
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扫描下载二维码这道题怎么做：用所给单词的适当形式
用所给单词的适当形式填空,使短文正确,通顺,每词限用一次.
like, second, make, be, watch, eye, danger, and, in, little
&&&& I think watching TV is not good for students. First, children&
&different from adults(成人).It's true that students&
&relaxing by watching TV. However , the&
&thing for students is that they just can't take their &
&off the screen (屏幕).They will go on watching TV for hours&
&hours. It's very bad for their eyes.
, many students have the habit of&
&too much TV. Then they will have&
&time for sports. Third, some TV programs are not suitable (合适的) for students.Finally,too much TV can&
&students weak (差的) in reading. They will lose interest&
&reading, which I think is a terrible thing.
熙爷mvCS22GH54
1.are 2.like 3.dangerous 4.eyes 5.and 6.Second 7.watching 8.little/less 9.make 10.in
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扫描下载二维码这道题怎么做?已知0°小于B小于360°,且角B 得7倍角的终边与角B的边也重合,求角B ?
神天卫衑0鶅
由题得7B-B=360k(k为整数)B=60k,因此B=60,120,180,240,300
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