A:fish
B:monkey
C:grade
已知函数f(x)=3cos2x+2sinxcosx,x∈R.
(1)求函数f(x)的最小正周期;
(2)求函数f(x)在区间0,π4上的值域.
①Na2SiO3②CaCO3③CaSiO3④SiO2⑤Na2CO3⑥CaO.
用所给词的适当形式填空
(1)It's time____(play)football.
(2)We want____(visit)the San Francisco next month.
(3)What about____(go)____(swim)tomorrow?
(4)—What are you going to do tomorrow? —I____(have)a party at home.
(5)She____(be)an English teacher next year.