X, y and z are three kinds of metals, and they have the following chemical equations: (1) z+yso4 ═ zso4+y (2) x+yso4 ═ xso4+y (3) z+H2SO4 θ.

According to the application and significance of metal activity sequence table, Z+YSO4═Y+ZSO4 indicates that metal activity is z > y；; X+YSO4═Y+XSO4 indicates that the activity of metal is x > y；; z+h2so4═zso4+h2↑； Explain that z is before hydrogen; X does not react with sulfuric acid, that is, X is behind hydrogen. To sum up, the activity sequence of the three metals is Z > X > Y, so D is correct and A, B and C are wrong.

So choose D.

How to massage to lose weight? Eight-step massage relaxed weight loss

Barbaric and fashionable aerobic boxing

What do you mean by nonsense?

The weight loss of female stars is coming soon. Andy became a fairy in Hundred Flowers Award. Who remembers that she is fat?

Suitable for students' party manicure whitening

What is the weight loss effect of the new compound rose hip powder?

Warm-up video tutorial before dancing

First, the necessity of warm-up activities

Adequate warm-up activities are the premise of dancing. Because ligaments and muscles need to be fully rela

Women's fitness suit

What food can make people not fat but help to lose weight?

How can I know if I am abdominal obesity? How to lose weight for abdominal obesity?