一块长方形钢板面积是12平方米,重540千克,每平方米钢板重多少千克?(列方程解答)
设每平方米钢板重x千克,可得方程:
12x=540,
x=45;
答:每平方米钢板重45千克.
情景交际
A: Hello!My 1 is Ben.I'm from London. 2 your name? 3 are you from?
B: 4 is Jingjing.I'm from Beijing.I'm twelve 5 old. 6 is my friend. 7 from Dalian.His name
is Damao.
A: Nice to meet you, Damao.
C: Nice to meet you, too.
A: 8 9 are you in,Damao?
C: I'm in Grade Eight.
A: Oh,I'm in Grade Eight,too!We are in the 10 grade.
异种电荷互相______.