判断题(本大题5小题,正确的选A,错误的选B,并在相应的方框内填涂,每小题2分,共l0分) 1..以下画像石生动地描绘了我国古代农业生产的场景,其
Without plants, people couldn’t live. We eat plants. _____36____. And we need plants for another reason: We need them because they are beautiful. _____37_____.Imagine no flowers with their sweet
已知函数,(为常数). (1)若函数与函数在处有相同的切线,求实数的值; (2)若,且,证明:; (3)若对任意,不等式恒成立,求实数的取值
⊿ABC中,∠ABC、∠ACB的平分线相交于点O。 (1)若∠ABC = 40°,∠ACB = 50°,则∠BOC = 。 (2)若∠ABC +∠ACB =116°,则∠BOC =
完形填空。I work in a small shop. It’s near an English 1 . Every day students come to 2 things.In the 3 . I get up (起床) at six. And then I have breakfast.I get go (到达) the 4 a
如图(a)所示为某一门电路符号及输入端A、B的电势随时间变化关系的图像,则图(b)中能正确反映该门电路输出端电势随时间变化关系的图像是(
如图,在△ABC中,∠C=90°,AB=5,BC=3,则cosA的值是 A. B. C. D.
2010年5月23日,央视《每周质量报告》栏目曝光美的、九阳等品牌用“天然”紫砂煲忽悠消费者的事件后,京城各大卖场全部下架标有“天然”字样的紫