【简答题】如图,已知底角为45°的等腰三角形ABC,底边AB的长为2,当一条垂直于AB的直线L从左至右移动时,直线L把三角形ABC分成两部分,令AD=x, (1)试写出左边部分的面积y与x的函数解析式; (2)在给出的坐标系中画出函数的大致图象.
【简答题】如图,已知等腰三角形ABC中,底边BC=24cm,△ABC的面积等于60cm 2 . (1)求腰AB的长; (2)若D、E分别是AB、AC的中点,求DE的长.
【简答题】It was raining. I went into a cafe and asked for a coffee. 36 I was waiting for my drink, I realized there were other people in the place, but I sensed 37 . I saw their bodies, but I couldn’t feel the...
【单选题】李明在阅读书籍的时候力图使之能够指导自己的工作,这在布鲁纳看来属于的学习过程是
【单选题】如图,已知等腰三角形ABC,AB=AC,底边BC的长为2,DE 是它的中位线,则下面三个结论: (1)DE=1; (2)△ADE∽△ABC; (3)△ADE的面积与△ABC的面积之比为1︰4 其中正确的有 [ ]
【简答题】请根据句意从方框中选择合适的动词,并用其适当时态填空,使句子通顺。 feel iron buy plan drink 小题1:—Where is Jack at the moment? —He tomorrow’s trip with Simon in the classroom. 小题2:—What a hot day! Are you thirsty? —No. I ...
【简答题】It was raining. I went into a café and asked for a coffee. 21 I was waiting for my drink, I realized there were other people in the place, but I sensed 22 . I saw their bodies, but I couldn’t fe...
【简答题】如图,已知等腰三角形ABC,D为AC中点,AB=BC=2厘米, DE , DF 分别是以B、A为圆心的弧.那么阴影部分的面积是多少平方厘米?
【简答题】It was raining. I went into a café and asked for a coffee. ____ I was waiting for my drink, I realized there were other people in the place, but I sensed ____. I saw their bodies, but I couldn’t feel ...