规模大的形容词

是spare no effort to do还是spare no efforts to do? 不遗余力不做某事是spare no efforts not to 比如,我们应该不遗余力地不要使用一次性塑料袋,怎么说呢? be used to do sth.used to do sth.be used to dong sth.之间有什么区别? L must spare no efforts to do my bit I spent two hours in doing my homework yesterday这是一道求同义句的英语题目,希望过程要完整, It spent 3 hours doing my homework yesterday,的同义句 若双曲线x方/a方－y方/b方=1（a＞0,b＞0）的离心率为根3,则其渐近线方程是? to spare是什么用法及意思,在句子中啥成分we have an hour to spare,是嘛意思 spare在此句子中的意思原句：The storm appeared to spare satellite and power systems as it shook the Earth’s magnetic field Thursday.问：请问此句子中特别是spare是啥意思啊? mary dances better than all ofAthey Bthem Cwe Helen dances better than other all the girls.这是一道连词成句的题,我这样做对吗?要是不对该怎样改,为什么? 求双曲线y=3/x与直线y=1/3x的交点坐标 已知双曲线x^2-y^2=4,讨论直线l:y=k(x-1)与这条曲线的交点的个数. spare no pains to 有没有spare more effort to do这种用法?越快越好,come on 求旅鼠之谜这篇课文给我们的启示要四个 在旅鼠之谜一文中,除了人口问题,我们还能获得哪些启示 试确定直线y=x 1与双曲线x2-y2=1交点的个数 I spent ten hours doing the work yesterday.改同义句It _____ _____ten hours_____ _____the work yesterday. I spent three and a half hours doing my work.(改同义句)I spent ____ ____ ____ ____ ____ doing my work. 直线y=1/2(x-7/2)与双曲线:x^2/9-y^2=1,交点个数有几个?Rt 已知双曲线y=5/x与直线y=x-7有一交点为（a,b）,求a/b+b/a的值 那天清晨落叶满地,两条路都未经污染中的“污染”本是一个贬义词,用在这里合适么 若点P(1,1)为圆(x-3)^2+y^2=9的弦MN的中点,则弦MN所在直线方程为 连词成句：dance,than,Helen,the,better,girls,all,other(.)The butterflies are beautiful.(改为感叹句） reads,than,she,other,better,all,the,students(.)连词成句 The girl dances better than the boy .The girls dance than the boys .变为复数时,为什么dances变单数. 填空If you keep practice ___ (speak)English every,you ___ (become)better and better. 用120厘米的铁丝做成一个长方形,长与宽比是3∶2求长和宽 已知有理数a,b满足条件a＞0,b＜0,比较a,b,－a,－b的大小 C²－根号c-1=0的解 已知三次根号a=4,且(b-2c)²-√c-3=0,求三次根号a+b3+c3的值