安全生产事故是客观存在的，要搞清事故的真相，唯一的办法是（）。
参考答案：客观、公正地调查
试述仰韶文化彩陶的分期？
将下列句子改为被动语态。
1. More and more people speak Chinese in the world.
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2. We can find new buildings everywhere in our city.
3. They will set up a new school in the small town next year.
4. We can use the water we use for washing rice again to Water flowers.
5. Students can't take magazines out of the reading room without permission.
