放在桌面上的台灯，对桌面有压力，其受力物体是（），施力物体是（）。
参考答案：桌面；台灯
用所给单词的适当形式填空。
1. Linda is _____ (athletic) than me. She plays sports every day.
2. That must be a lot more fun than _____ (take) a subway.
3. There are two basketball _____ (match) on CCTV-5 today.
4. Chinese medicine is very popular in some _____ (west) countries.
5. Li Ming _____ (leave) for Beijing next Sunday.
下列（）不是包装谷物的特性。
A．吸附性
B．下沉性
C．呼吸性
D．吸收和散发水分特性
