阐述蓝牙网络的拓扑结构。

用所给词的适当形式填空。

1.  —What do you usually do on weekencls?

     —I often do some _______ (read).

2.  Here _______  (be) the results of the student activity survey.

3.   _______ (drink) milk is good for our health.

4.  I try _______ (eat) a lot of vegetables.

5. Good food and exercise help me  _______ (study) better.

霾

如果室内拍摄时有日光灯，窗外又是阳光明媚，这时就要设定日光白平衡模式。

在市场经济活动中，为了获取利益，可以采取各种手段，与同行竞争。