A:左上方
B:左下方
C:右上方
D:右下方
(Ⅰ)求函数f(x)的最小正周期和最小值;
(Ⅱ)在△ABC中,A,B,C的对边分别为a,b,c,已知c= 3 ,f(C)=0,sinB=2sinA,求a,b的值.
请回答有关农业生态系统的问题:
太阳直射南回归线的这一天,是北半球的 ( )
Who
name
A. Alice B. Annie ____
A.Shelly B.Monica ____
age
A.14 B.13 ____
A.34 B.42 ____
Nationality(国籍)
A. B. ____
Job
Hobby
A.reading books and riding a bike B. studying English and go cycling ____
A.ice-skating and playing badminton B. going swimming and taking pictures ____