A:世界不是由神创造的,而是由人创造的
B:存在决定思维
C:世界观不同,对事物的看法就不同
D:思维是世界的本原,思维决定存在
--I think it's really necessary. It is reported that the food that Chinese people
every year is enough to feed 200 million people for a year.
选出你所听到的单词( )
若函数f(x)=(m﹣1)x2+mx+3 (x∈R)是偶函数,则f(x)的单调减区间是____.