下列物态变化中，都是吸热的是 (       )

我国营养学家将食物按每日建议摄取量，设计成“平衡膳食宝塔”请分析回答：

（1）“平衡膳食宝塔”中的食物含有人体所需的糖类、脂肪、蛋白质、维生素、水和____ 等六种营养素．

（2）根据“平衡膳食宝塔”的建议，每日摄取量最多的应为第①层食物，因为该层食物富含糖类，能满足人体对____ 的需求；摄取量最少的应为第⑤层食物，因为该层食物富含____ ，过量摄取易在人体内储存导致肥胖．

（3）每日应摄取足量的第②、③、④层食物，因为这些食物含有多种营养素，如第③层食物除富含蛋白质外，有的还富含维生素A，可预防夜盲；第④层食物中的牛奶富含蛋白质和骨骼发育所需的____ 

A: Good afternoon! How are you?

B: Fine, thank you. Oh, that's Tom speaking.

A: You're right.____

B: Sure,but she is doing her homework. Wait a moment. Lucy, it's Tom.

(After Lucy answers the phone. )

C: Hello. Tom.

A: Hello, Lucy.____

C: I have no idea. How about you?

A: I'm going fishing nearby on Saturday. Would you like to go with me?

C: ____ I'm sure we can have fun together. By the way, How can we get there?

A: ____ It's not far from here.

B: Sounds good. ____

A: Let's make it 8 :00 am at the school gate. OK?

B: OK. See you then.

A: See you.