织制府绸和平布时,那个开口时间稍早,为什么? 发布时间:2017-05-09 12:50 │ 来源:www.tikuol.com 题型:问答题 简答题 问题: 织制府绸和平布时,那个开口时间稍早,为什么?
题型:问答题 简答题 若函数f(x)=2sin(π6x+π3)(-2<x<10)的图象与x轴交于点A,过点A的直线l与函数的图象交于B、C两点,则(OB+OC)•OA=( )A.-32B.-16C.16D.32 查看答案
题型:问答题 简答题 I would like to buy some good English reference books, but _______ was available from the bookstore, where I only found some Chinese ones.A.nothingB.no oneC.noneD.neither 查看答案