谨小慎微

寻Close to You(They Long To Be)--Carpenters超级喜欢这首歌!电影《夕阳天使》插曲 莫文蔚有翻唱过这首和电影原声有点不同,电影原声更好听.有谁有原声带MP3,希望能发过来!谢谢不是莫文蔚翻唱的那 两种金属混合粉末15g,与足量的盐酸反应是生成11.2L氢气（标准状况）,符合上述情况的金属化合物的是( )两种金属混合粉末15g,与足量的盐酸反应是生成11.2L氢气（标准状况）,符合上述情况的 f(sin(-x))=-f(sinx)?为什么成立? 若f(x)=sinα-sinx,则f'(α)等于多少 氢气和氧气的混合气体共10g,在密闭容器中点火反应后,剩于气体为一克,则原混合气体的组成可能为? 以知f（1-sinx)=sin方x,求f(x) 如果f(x+π）=f(-x),且f(x)=f(-x),则f(x)可能是?sin2x或 cosx 或 sin[x]或 [sinx] f(sin^2x)=x/sinx 求f(x) – Who bought those toys,do you know?– Oh,they _____.They were the things we had made ourselves.A.hadn’t bought them B.didn’t buy them C.hadn’t been bought D.weren’t bought为什么?其中They were the things we had made ourselves.希望 last they agreed ___ the time to meetAt last they agreed ________ the time to meet.A.on B.to C.with D.for They spent as much time traveling as they_________.They spent as much time traveling as they_________.A.readingB.were readingC.did to readD.did reading急 高一英语必修一 题Einstein is one of the greatest scientists of -timesA new B ancient C old D modern Who would you rather( )as the captain of the team?Who would you rather( )as the captain of the team?--I've not decided yet.I'd preaf to listen to ypur opinion.A .have to act B have act C to have acted D.to have acting一定要讲一讲呀, 发射卫行的过程中为什么轨道在加速到大于第一宇宙速度时会变成椭圆的而不是直接变成圆的 求y=sinx*sin(x+60)的最大值 求y=sin(x-π/3)sinx最大值 y=sinx+sin(x-π/2 )的最大值是多少啊? y=sinx/2+sin(60-'x/2)的最大值.怎样做? 高一数学含绝对值的不等式A=｛x||x-1|＜|x-2|｝,B=｛||x-t|≤1／2｝,若集合B包含于集合A,求实数t的取值范围 2x+3y=2k-5,x-2y=-k+7 且x的值与2Y的值互为相反数,求k的值 同步卫星（速度在第一宇宙速度和第二宇宙速度间时）为什么是椭圆轨道 已知关于x,y的方程组为{2x+3y=2k-5,x-2y=-k+7,且x的值与2y的值互为相反数.求k的值 （√3-1）sinX=sin(120°-X)怎么解?急... Y(X+Y)+(X+Y)(X-Y)-X² ,其中X=-2 Y=½ 求先化简,再求值 先化简,再求值:(x-½y-1)（x-½y+1）-(x-½y-1)²,其中x=5,y=3. 五个连续自然偶数的和是130,这5个连续偶数分别是? 谁能帮帮解一下,最好不要用含二元以上的方程甲车由A点开到B点需要6小时,乙车由B点开到A点需要4小时,两辆车各自从A、B点出发,甲车行驶96千米后两车相遇,求AB两地的距离.侄子上小学,还没学 已知sin(α+30度)=12/13,且60度 sin(x+30°)=0.6 Sinx= 已知sinx=1/3,x∈(90,180),求sin（2x-45）和cos（2x+30）, 将8个棱长为2厘米的正方体堆在地面,怎样露出的面最少? sin120是多少