“don,t draw pictures on the blackboard” 怎么改成否定句?

相关推荐

• 句子检验 根据括号中的要求改写句子.1.Tim has a watch.(改成否定句)Tim a watch2.Linda plays ping-pong every day.(改成一般疑问句)Linda ping-pong every day?3.I have three volleyballs(改成一般疑问句)have three volleyballs4.His uncle has a soccer ball(用some替换句子中的a)His uncle has soccer .B.根据标点提示连词成句1.is book interesting the2.every Sue tennis plays day3.she does a volleyball have4.don't they a ball soccer have5.look let's at two pictures the
• The book is about the future of _____（科技）.It will _g____ warm at the North Pole in the future.We can _s____ some flowers to our mums on Mother's Day.Our teachers don't write on a blackboard with _c____._S____ is the first season of the year.The children need some _p_____,because they want to draw pictures.
• _S____ is the first season of the year.The children need some _p_____,because they want to draw pOur teachers don't write on a blackboard with _c____._S____ is the first season of the year.The children need some _p_____,because they want to draw pictures.
• “don,t draw pictures on the blackboard” 怎么改成否定句?
• 关于高数求导的题求f(x)=lim(n趋于无穷大）x(1-x^2n)/(1+x^2n)的值
• 请教一高数题目(隐函数求导)若X^y=Y^x,求dy/dx 这个题目可以直接用公式dy/dx=-Fx/Fy来求,但我求出来的结果与书上答案不一样,解了半天我发现书上的答案是将X^y=Y^x的结论代入到了求导的结果中,使答案更加简化.我想请教这样代入是合理的吗?还是说答案是另外的方式解出来 这里还有一题也帮我解一下:F(x,y)满足x*Fx(x,y)+y*Fy(x,y)=F(x,y),Fx(1,-1)=3,点P(1,-1,2)在曲面Z=F(x,y)上,求点P的切平面方程