我国目前有多少自然保护区

f(x)=e^xsinx 求f'''(0) Hao do you get to school 求回答.QAQ!尽量用算术解!方程的活就要用简单一点的方程!1.甲乙两车同时从A、B两地相对开出40分钟相遇.相遇后以原速度继续向前进,乙车又经过5分钟到达A、B两地的中点.甲车每分钟行全程的 这首歌的歌名什么?细雨飘,清风摇,凭借痴心般情长; 皓雪落,黄河浊,任由他绝情心伤; 放下吧,手中剑,我情愿唤回了,心底情,宿命荆为何要,孤独绕,你在世界另一边;对我的深情,怎能用只字片语, 2x=y-52x=20吗? 角ABC等于角ADC,DE平分角ABC,BF平分角ABC,角DEA等于角FBA,那么,DF与BE平行吗? 老板以200元的价格卖出两件不一样的衣服,一件赚了五分之一,一件亏本五分之一.他是赚了还是赔了? 求个女性英文名,含义是下雪求一个女性的英文名,要求这个名字的含义是下雪,最好还是下大雪.snowy和snowwhite都太俗了，而且后者容易让人联想到白雪公主，有点矫情。最好是不带snow的 如图已知,角ABC=角ADC,BF、DF分别平分角ABC、角ADC,且角1=角2,求证：角A=角C 手写具体步骤哟 解下列分式方程：2/(x-1)(x+1)=1/x(x+1) （要有检验过程,谢谢） We often (go to the movies) on weekends?针对括号提问 《Outside Over There》是什么 命题“等边对等角”是______命题（填“真”或“假”） 它的逆命题是_____初二数学题：命题“等边对等角”是______命题（填“真”或“假”）它的逆命题是_____请给我解释一下,不要只是答案, 等边对等角的逆命题是 等边对等角,它的逆命题是真命题吗? I often go to the library in my ____ time. 根据句意填空Miss Li is ____enough to buy such a big new house.Xiao Shenyang is so______ that I can't help laughing when I watch his performance. Jerry speaks good chinese做同意句改写,注意单三式,帮下忙 how often do you go to the library的答句是什么? how often do you go to the library -- -- -- do you go to the library a week 改为同义句 用正确的动词时态填空He would enjoy this if he ___(be) present.She can do better if she _____(try).If you play with matches,you ______(burn)your fingers.If you broke this window,you _________(have to) pay for it.If you _______(lose) your way How often do you go to the library?in two days B.every few days为啥选A look !something bad ____over there(happen) 急!实数m=cos2x+sinx-1,这实数m的取值范围是?希望能有一详细点的步骤,快点啊! 英语时态填空 in the last few months,the doctor -----(cure)over 200 children with eye problems. She wonders why no one a___the telephone now.只有一个空,有now不是应该用is answering 又脆又香这样的词语有哪些 什么词是和又香又脆一样的 初三的英语时态!急求 中位线三角形与原三角形的周长比是_____ ,面积比是_____刚问的,怎么没了. 用所给动词的适当时态填空1、i (be）busy last night.i (do) my homework and some housework.2、she often (go) shopping on sunday.but she (stay) at home last sunday.3、he (get) up late this morning.4、 (not drive) so quickly.5、listen,so 适当的时态填空This ___(be)the way he___(brush)his teeth.