读短文，判断正(√)误(×)。

      It's 11: 30. I'm in the canteen. I have rice, beef and potatoes for lunch. It's cold today. I wear my new

sweater. It's cheap. But it's very nice. It's only 25 yuan. I like it very much.

( ) 1. It's eleven thirteen.

( ) 2. I have rice, beef and tomatoes for lunch.

( ) 3. It's not hot today.

( ) 4. My sweater is twenty-four yuan.

( ) 5. The sweater is very expensive.

学习科学的过程应该是幼儿（）的过程。教师要让幼儿亲自动手、动脑去发现问题、解决问题，鼓励幼儿之间的（）活动。