A:①②③
B:①②④
C:①③④
D:②③④
— Can I have ______cakes, please?
— Sorry, I don't have _____ cakes in my fridge.
“科学用眼,保护视力”是青少年珍爱生命的具体表现.科学证实:近视眼镜的度数y(度)与镜片焦距x(m)成反比例.如果500度近视眼镜片的焦距为0.2m,则表示y与x函数关系的图象大致是( )