目前,货运电子交易方式在我国还处于______。
A.成熟阶段 B.成长阶段 C.初级阶段 D.高级阶段
参考答案:C
已知函数f(x)=4sin2(x+)+4sin2x-(1+2),x∈R.
(1)求函数f(x)的最小正周期和图象的对称中心;
(2)求函数f(x)在区间上的值域.
Judging from his __ look, I can say Mr. Li is ___ at our arrival at this time.
A.annoying, annoyed
B.annoying, annoying
C.annoyed, annoyed
D.annoyed, annoying