下列变形不是根据等式性质的是( )
A:0.3x0.5y=3x5y
B:若﹣a=x,则x+a=0
C:若x﹣3=2﹣2x,则x+2x=2+3
D:若﹣12x=1,则x=﹣2
说明:热效应的产生与导体的电阻有关.当电阻消失,电流的热效应就不在.所以电热器一般是由____组成.超导体____(能,不能)用于电热器.
已知点A1(a1,a2),A2(a2,a3),A3(a3,a4)…,An(an,an+1)(n为正整数)都在一次函数y=x+3的图象上.若a1=2,则a2014=____.
--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.