Many people think that twins are exactly the same. But some of them are not! Al and Mike are twin brothers. They look the same and in some ways they are the same. But in other ways they are different. Al and Mike are both very strong. Al and Mike both like soccer. But Al plays soccer every day and Mike plays soccer only on weekends. Mike likes watching soccer games on TV but Al only likes to play the game, not to watch it. Al and Mike are both outgoing and funny, but Mike is a little more outgoing than Al. Mike is also a little more serious about school. Al and Mike are very popular at school, and they both have a lot of friends.

根据短文内容判断正误.

读等高线地形图，回答下列问题。

长方体的主视图与俯视图如图所示，则这个长方体的体积是____.

一位同学在测量质量时，在天平的右盘中无论怎样加减砝码，都不能使天平平衡，可采用的方法是（ ）

下列等式正确的是