土地用途变更登记不涉及土地权利人或土地权利人名称的变更，土地权利证书的（）未发生改变

短文改错（共10小题；每小题1分，满分10分）

My summer travel started terribly. I was at the Shanghai Railway Station buy a ticket to Hang Zhou. I was going to visit a friend here and after that I would go to Xiamen for long holiday. I bought my ticket but turned around to pick up my bag from the floor and then I realized that someone had stolen it. Luckily I had all my money on my pocket, but the only clothes I had was those I had on. It felt very strange to travel without any luggages. When I finally arrived at my friend, he lent to me lots of clothes. I feel very happy that I could change my clothes at last.

东汉明帝之后，东汉王朝的继位皇帝年龄都太小，比如汉和帝、冲帝，导致下列哪种现象比较显著：（）

A、宦官专权

B、大 * * 崛起

C、太后干政

D、上述都不对

下列不属于"既往史"内容的是（）

A.预防接种情况

B.过去健康状况

C.过敏史

D.传染病史

E.是否到过传染病的流行地区

合约基准价的高低是根据提出需求的一方的需求来确定的。

瓦斯地质研究的主要内容有那些？