— And he often buys magazines.
A:Yes, he does
B:No, he doesn't
C:Yes, he is
D:No, he isn't
如图,L是四边形ABCD的对称轴,如果AD∥BC,有下列结论:
下列运算正确的是( )
(Ⅰ)求函数f(x)的最小正周期与单调递减区间;
(Ⅱ)求函数f(x)在区间 0,π2 上的最大值和最小值.
下列地形区与所在的大洲组合正确的是( )