（本题满分14分） 已知：函数的最大值为，最小正周期为． （1）求：，的值，的解析式； （2）若的三条边为，，，满足，边所对的角为．求：角的取
山西省正在建设我国最大的炼铝厂，其考虑的主导因素是：（ ） ①山西铝土矿资源丰富 ②山西劳动力资源丰富 ③山西炼铝工业
已知f(x)是定义在[-1，1]上的奇函数，且f(1)=1,若a、b∈［-1,1］,a+b≠0时，有＞0判断函数f(x)在［-1，1］上是增函数还是减函数，并证明你的结论.
Ryan: 61 Ethan: An old one.Ryan: I know it’s old. But what make (品牌) is it?Ethan: It’s a Ford. Why do you ask? 62 Ryan: Oh, no. My cousin is going to take a job oversea
许多场所或产品的外包装常有一些标志。下列各图标属于物品回收标志的是
—What were you doing at this time yesterday? —We _______ in the classroom. A. read B. were reading C. are re
单项选择 —What will you do if it ______ tomorrow？ —We have to carry it on, since we've got everything ready. A. is raining B. rains C. will rain
