已知正方体的棱长为,、分别是边、上的中点,点是上的动点,过点、、的平面与棱交于点,设,平行四边形的面积为,设,则关于的函数的图像大致是 (
如图，已知点L、M、N分别在△ABC的边BC、CA、AB上，且=l,=m,=n,又++=0,求证:l=m=n.
对于命题p和q,若p∧q为真命题,则下列四个命题: ①p∨q是真命题;②p∨﹁q是假命题; ③﹁p∧﹁q是假命题;④﹁p∨q是假命题. 其中真命题是 ( ) A.①②
阅读下面的文言文，完成后面小题目。徐光启，字子先，上海人。万历二十五年举乡试第一，又七年成进士。由庶吉士历赞善。从西洋人利玛窦学天文
Camp Jano India Celebrate Indian culture, languages, arts, festivals and literature. Weekly themes are brought to life through related arts, games, projects, stories and theatre in a very unique,
We should take part in such activities in future _____ we did yesterday. A. which B. as C. that D. than
I love this healthy diet program because, it helps you lose weight, lose inches, feel healthy and look beautiful. This healthy diet is an 8 week's program which is unlike other diet regimes （食物
唐朝由盛转衰的最主要的原因是 （ ） A．奸臣当道，造成朝政混乱 B．安禄山和史思明发动叛乱 C．
