In the jungle of Africa, there lives a family of monkeys. There is a Mama Monkey and a Papa Monkey, and they have a young daughter named Hananh. The monkey family lives very happily，swinging and playing in the trees. But it isn’t all play. Papa Monkey has to make sure their home is warm and safe. Mama is responsible for the sewing and cooking of the family’s meals. Hannah helps with the cleaning ,but her main job is to collect all the bananas and other fruit for the monkey family’s meals

小题1:There are ____monkeys in the family .

A．two

B．three

C．four

D．five小题2:Who must keep their home warm and safe?

A．Mama monkey

B．Papa monkey

C．Hannah

D．the son小题3:The daughter does the cleaning and collects ____

A．apples

B．bananas

C．other fruit

D．B and C小题4:Where do they live?---They live___________.

A．in the jungle

B．near the beach

C．in the lake

D．under the sea

对磨机内钢球运行阐述正确的是（）

A、当磨机高速运转时，钢球可以呈离心状态

B、钢球在抛落状态时，对矿石起着冲击、磨削、挤压作用，粉碎效果较好

C、钢球在磨矿机中可形成泻落、离心、和抛落三种运动状态

D、钢球在泻落状态时对矿石仅起磨剥作用