品种法和分类法

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钢铁的含义哪位知道“钢铁”的含义? 《养花》课文第5自然段写了三个内容:1别人夸花,全家骄傲;2昙花开放,约朋友共 Love a person, but he is greater than I, and she didn't know I have no coura是什么意思? 已知椭圆C的焦点是F1(-根号3,0)F2(根号3,0),点F1到相应的准线的距离为3分之根号3,且倾斜角为锐角的直线L与椭圆C交于A,B两点,使/F2B/=3/F2A/.求椭圆C的方程 什么是哲学 描写大自然的五个句子 描写大自然的5个长句子,也不要太长. the main difference is that the appetite regarding what to support...the main difference is that the appetite regarding what to support varies.This definition is not extremely distinct,but it's a start.support varies In the class there are four A___ students 90%,1,4/5(四分之五),110%,0.7,(分数),(百分数),(小数),1/2(二分之一),140%,...3/20(三分之二十),(百分数),0.65,9/10(九分之十),115%,(小数),(分数),(百分数)... 浙江教育出版社的28页,用计算机找出最大的积!(1)用1,2,3,4,5组成一个三位数和一个两位数,这两个数最大的乘积是( )(2)用0,2,4,5,6组成一个三位数和一个两位数,这两个数最大的乘积是( )(3)用0,3,4,8 opportunity;as though;make up one's mind to do sth;see that;favorite;keep up with分别造句 over= 哪个短语 带有ROLL或OVER的英语词组或单词有哪些 抽象函数如何求导.谢谢请叙述具体点 有be over这个短语吗? 复合抽象函数求导偏导 高中阶段关于over的词组不超纲 越多越好 能与over连用构成短语的有哪些? yours主格 mine主格 Can you help me to wash the dishes.哪错了 Could you help me_(do)the washing this afternoon? ——Jim,can you help me to wash the dishes?——sorry,dad.I__to the shop.A,a B,an C,the D,another请说明原因,及翻译,这是一道中考题。 Xiaohua has ___bad cold and has to stay in bed A:a / B :a the C:/ the D:the / 高二英语Unit7 Live with disease 里面的Xiaohua到底有没有这个人哦课文里这个故事是真的吗 笑话xiaohua请大家说几个笑话. 请问函数中的对应关系与对应法则是一个概念吗? OVER YOU 听力里面有这样一段话:---Woman:do you think we should invite Peter over for dinner?---Man:His mother's here for a visit.问:What does the man mean?A.Peter's mother is coming for dinner.B.Peter will be unable to come那个男的说 Hi not over you?啥意思 钢材产量? 关于二元抽象函数二次求导 如图第四题,题目中的u应该是z 简便运算 (1+1/3+1/5+1/7)*(1/3+1/5+1/7+1/9)-(1+1/3+1/5+1/7+1/7+1/9)*(1/3+1/5+1/7)