【单选题】函数 y=co s 2 (2x- π 3 ) 的图象向左平移 π 6 个单位,所得的图形对应的函数是( )
【单选题】已知定义在[-1,1]上的函数y=f(x)的值域为[-2,0],则函数y=f(cos2x)的值域为( )
【判断题】钢筋混凝土梁斜截面抗剪承载力计算时,梁的汁算剪力包络图是计算得到的各截面最大剪力组合设计值V d 乘上结构重要性系数γ 0 。后所形成的计算剪力图。
【简答题】Tracy Wong is a wellknown ChineseAmerican writer.But her writing ____ was something she picked up by herself.After her first ____, teaching disabled children, she became a parttime writer for IBM._...
【单选题】钢筋混凝土梁斜截面承载力计算公式中, α 1 是异号弯矩影响系数,计算简支梁和连续梁近边支点梁段的抗剪承载力时, α 1 =( )
【简答题】Tracy Wong is a well-known Chinese-American writer. But her writing ____ was something she picked up by herself. After her first____, teaching disabled children, she became a part-time writer for IBM....
【单选题】碧兰麻主要成分为4%阿替卡因和1:10万的:
【单选题】函数 y = 2 cos 3x 的值域为( )。
【判断题】函数 y=cos x 的值域为 【-1,1】
【简答题】已知函数 f ( x )=sin + -2cos 2 , x ∈R(其中 ω >0). (1)求函数 f ( x )的值域; (2)若函数 y = f ( x )的图象与直线 y =-1的两个相邻交点间的距离为 ,求函数 y = f ( x )的单调增区间.