七年级信息技术课本

一本故事书有120页,小明第一天读了全书的1/6,第二天读了余下的1/4,第三天从第几页读起? would you mind moving your book?改为否定疑问句 现在的数学家都有谁啊? a is to b what c is to d中的what 是关系代词但它引导的是什么从句? A is to B what Cis to D(A与B的关系犹如C与D的关系)中的what 是关系代词但它引导的是什么从句? Y=1-1/[2X-a]在【1,无穷大】上是增函数,求a的取值范围. 急!跪求此概率论解题步骤和答案!万分感谢!本班有81人,设每人寿命相对独立,都服从参数为1/80的指数分布,设在[0,80]岁死去的人为X个.求P（X=K),0≤K≤81求Ex,Dx 概率论与数理统计,非常着急,设两个相互独立随机变量X和Y分别服从正态分布N（0,1）和N（1,1）,则有（ ）（A）P（X+Y 命题,若实数a满足a＞2,则a^2≥4是真命题吗?我觉得它是假命题,因为a不等于2搞糊涂了，它同时满足真假命题。a^2不能等于4吧。 he is from ,he can speak .（Enhe is from ,he can speak .（England） 若实数a,b满足a+b=1,1/a+4/b的最小值为9,命题是错的,怎么证明 (1/2)To my amazement,some of the visitors coming from America can speak 如果实数a=1且b=1,这样命题的否命题怎么写? they've been a hit 是什么意思?请教各位根据上下文绝对不是被打的意思. 1.｛4x+(8-x)x2大于或等于30 3x+(8-x)x8大于或等于20 2.{2x+y=2280 x+2y=16801.｛4x+(8-x)x2大于或等于303x+(8-x)x8大于或等于202.{2x+y=2280x+2y=1680 x+2y=1680怎么解 设a,b为实数,下面四个命题.①若a＞b,则a2＞b2 ②若a2＞b2,设a,b为实数,下面四个命题.①若a＞b,则a2＞b2 ②若a2＞b2,则a＞b③若/a/＞/b/,则a2＞b2 ④若a2＞b2 则/a/＞/b/正确的有哪几个 rent (make)toys on your bed,make用什么形式填空? she is from china ,she can speak chinese连词用and还是用so Mr black comes from America,and he has studied Chinese in China for 5 years.So you can talkwith him____.求翻译、谢谢A.either in English or in ChineseB.not in Chinese but in EnglishC.just in English,not in ChineseD.neither in Chinese nor in Engl Videos什么意思 downloaded videos的 意思 the big picture和practice what one preaches的翻译?what is the big picture here? what is most important about this product?Tessa says honesty is very important. she practice what she preaches by being honest herself. 这是用水彩笔的画画的正确方法用英语怎么说英语,不是什么床单 A This is the way we draw for markers B This is a way we draw markers C This is the way we draw markers 钢管SC70 桔子用水彩笔怎么画 《荷花》这篇课文以“我”的感受为线索,写出了荷花的美.用自己的话说说作者在公园里看到了荷花怎样的迷人景象? 这是我用水彩笔画画的方式.翻译成英语如题 谢谢了 用水彩笔和荧光笔能画出亮亮的效果吗?求画画高手指教我要画的是水彩画,因为不会用水粉,我是要画一个银河,就是这个图,用什么能彻底表达出效果?需要哪些注意事项? What is Geoffrey Chaucer's contribution to English language A is to b what c is to d这个句式中都是用what的吗?有没有一种情况是ABCD是数字,表示比例上的关系的时候用as的?12 is to 4 as 18 is to