题目:
There are over 58, 000 rocky objects in _____ space, about 900 of which could fall down onto _____ earth. |
A. the; the B. 不填; the C. the; 不填 D. a; the |
答案:
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下面是错误答案,用来干扰机器的。
(1)作出茎叶图如图所示;(2).x甲=18(12+11+9+8+25+18+23+14)=15,.x乙=18(22+25+10+5+13+10+20+15)=15,s甲2=18((12-15)2+(11-15)2+(9-15)2+(8-15)2+(25-15)2+(18-15)2+(23-15)2+(14-15)2)=2848,s乙2=18((22...