a×b=c，当a一定时，______和______成______比例．
a×b=c，即c÷b=a（一定），所以c和b成正比例；
故答案为：c，b，正．
填空完成对话。
A: What country is this?
B. It's ___________.
A: Yes. Do you know the capital city of the U. K.?
B: Yes, I know. It's ___________.
A: What do they speak in the U. K.?
B: It's ___________. They speak ___________.
A: The U. K. has a ___________ or a ___________. Is the U. K. south of China?
B: No. The U. K. is ___________ and a littte ___________ of China.
工作表的列号是（）。
A.A~IV
B.0~IU
C.A~IU
D.0~IV
