项目经理正在努力协调所有活动，确定如下信息：活动1可以马上开工，估计活动工期为1周；

当你正在学习时，从隔壁邻居家传来了“震耳欲聋”的音乐声，你可以采用哪些方法减弱噪音：

（1）______；

（2）______；

（3）______．

有400 t含Fe₂O₃质量分数为80％的赤铁矿石，最多可炼出含碳和其他杂质为3％的生铁多少吨?

根据句意，用括号中所给词的适当形式填空。

1. Computers are used by people for _____ problems. (do)

2. Spaceship _____ people have reached other parts of the universe. (with)

3. Britain is only 30 kilometers away from _____.  (French)

4. I think English is _____ than math. (important)

5. The Great Wall is over six _____ kilometers long. (thousand)

6. The hat was _____ of silk. (make)

7. The moon _____ round the earth . (travel)

8. Sheep are _____ by farmers for producing wool and meet. (keep)  

9. Do you know the boy _____ his hand towards us? (wave)

10. Everyone is supposed _____ a seat belt in the car. (wear) 

应用普通胰岛素错误的是()。

A．皮下注射

B．常换部位

C．餐前使用

D．小量开始

E．室温保存

旅行社产品的高度综合性和强烈的季节性决定了建立旅行社协作网络的必要性。