下列行为中，不属于房地产有偿转让的是(　　)。A．房地产抵债 B．房地产作价入股 C

短文改错（共10小题，每小题1.5分，满分15分）

Now I’d like to introduce our English paper to you. On my opinion, the paper is very imptance to our study and daily life. We can improve our English, especially writing English by reading it and writing. At the same time, it’s a fun and relaxing to read it, it makes our after-class time meaningful and colorful. There is a lot of columns in our paper, such as School News, Teachers’Advice and Students’Voice.Not only it make us learn the important events of our school, but helps ourselves communicate with teachers. However, we can take the advices from our teachers more seriously. In a word, I like our paper very much.

请你运用燃烧和灭火的相关知识，解释以下事例：

(1)                                                                     ；

(2)                                                                     ：

(3)                                                                     。

试述预防母儿血型不合并发新生儿黄疸的3种方法。

焊接不锈钢的氩弧焊机一般有______和______两种。

压力管路中液体的水锤现象