假定债券市场上一年期债券利率有2.25%，2.50%，3.0%三档，一般来讲，此三档

Do you live in a city? Do you know how cities began? Long long ago, the world had only a few thousand people. These people moved from one place to another. They moved over the land, hunting animals for food.

No one knows how or when these people learned about growing food. But when they did， their lives changed. They did not have to look for food any longer. They could stay in one place and grow it. People began to live near one another, so the first village was established. Many people came to work in the villages, and these villages became even larger.

When machines appeared, life in the villages changed again. People built factories. More and more people lived near the factories. The cities began.

Today, it’s strange that some people are moving back to small villages. Can you tell me why?

根据短文内容，判断正(T)误(F)。

小题1:People moved from place to place to hunt animals.

小题2:The story says,“No one knows how or when these people learned about growing food. But when they did, their lives changed.” In this sentence, the word “they” means people.

小题3: When machines appeared, life in the cities changed again.

小题4: All people like to live only in very big cities.

小题5: People built factories after the cities grew big.

甲、乙、丙合作写了一篇学术论文。甲欲将作品交某杂志社发表，乙则以该杂志社的稿费不够丰厚为由表示反对，丙未置可否。下列关于该事件的表述，正确的是( )。

A．甲有权不顾乙的反对而将作品交该杂志社发表

B．如果乙坚持反对，则甲不能将作品交该杂志社发表

C．在丙同意的情况下，甲可以不顾乙的反对而将作品交该杂志社发表

D．如果丙以同样的理由表示反对，则甲不能将作品交该杂志社发表

重物和“小桌”按图中甲、乙两种方工放在砂盘中，发现甲方式中“小桌”陷入砂盘深度比乙方式中的大，其原因是甲方式中__________________。

下列实验设计能够成功的是 [ ]

天平与砝码应定时检定，一般规定检定时间间隔不超过（）

A.半年

B.一年

C.二年

D.三年