下列食物链正确的是（  ）

There is a new movie Invisible guest(看不见的客人) on show. Li Hua and her parents will watch it. They can go there airy day. Please help her work out which is the lowest price for them.

Invisible guest Tuesday evening￥60                 Sunday￥80 If you have a student card, you can have a discount of 40% off If there are three persons, you can have a family price 132 for three(except weekends)

如图，在平行四边形ABCD中，对角线AC、BD相交于点O．如果BD=12，AC=10，BC=m，那么m的取值范围是（　　）

（2015•莱芜）一瓶酒精用掉一半，关于剩下的酒精，下列判断正确的是（　　）

豌豆在自然状态下是纯种的原因是