老年人的食物加工应多以清蒸和煸炒、而少用炖煮和油炸为好。
参考答案：错
---Everybody is playing on the playground. Can I join them , Miss Lin?
--- __________________ Not until you have completed the Maths exercises.
A．Why not?
B．Will you?
C．I hope so.
D．I’m afraid not.
细菌和真菌对于自然界中二氧化碳等物质的循环起着重要的作用。[ ]
