问题 选择题

下列说法中正确的是

A.用苯萃取碘水中的碘时,应先打开上端玻璃塞再将苯层从分液漏斗下口放出

B.用湿润的红色石蕊试纸检验氨气

C.稀释浓硫酸时,应将浓硫酸沿玻璃棒缓慢注入盛水的量筒中

D.用广泛pH试纸测得0.1 mol·L-1 NH4Cl溶液的pH=5.2

答案

答案:B

题目分析:苯的密度小于水的密度应在上层应从上口倒所以A错。常见的石蕊试纸有两种蓝色和红色的,蓝色石蕊试纸是检验酸性气体的,红色石蕊试纸是检验碱性气体的 有红变蓝所以B对。稀释浓硫酸时应将浓硫酸沿烧杯内壁缓缓的倒入盛有水的烧杯中并不断用玻璃棒搅拌 C错。广泛pH试纸只能精确到1,所以D错。

阅读理解

阅读理解 

         It’s Sunday. It’s fine. Tom does not go to school today. But he is not at home. He’s now sitting(坐) on a Chinese bus. He is going to the movie house. All his classmates(同学) will go to see a movie this afternoon. His teacher Mr Wang will go there, too. They will meet at 2:00 p.m. at the gate(门口) of the movie house.  

         An old man gets on(上车) the bus. Tom stands up and says(说) to the old man, “Come and sit here, please.” The old man goes over and sits down. He says, “Thank you very much, my boy. You are a good student.” Tom answers, “You’re welcome.”  

     “What school are you in?” the old man asks Tom.  

     “I am in No. 2 Middle School.” Tom answers.

     “No. 2? That’s a good school. My son is a teacher there. He is an English teacher.” The old man says.  

     “English teacher? Excuse me, grandpa. What’s your son’s name, please?” Tom asks.  

     “Mr Wang,” says the old man.  

     “Ah, ah, he is my English teacher.” Just then, the bus stops near the movie house. Tom says goodbye to the old man and gets off(下车) the bus. The old man smiles(微笑) to Tom.

1. In the sentence(句子) “the bus stops near the movie house”. “stop” means (意思是)______.  

A. 车站      

B. 开      

C. 关      

D. 停

2. Which(哪一句) is right?  

A. It's Saturday today.  

B. It's not fine today.  

C. Tom goes to school on Sunday.  

D. Tom is a student of No. 2 Middle School.

3. Mr Wang is_____. 

A. at home today  

B. the old man's son  

C. the old man's father  

D. a Chinese teacher

4. What do you think of Tom? 

A. Tom is a good student.  

B. Tom is a bad(坏的) student.  

C. He does wrong(错) things.  

D. He is a good teacher.

5. Which is right?  

A. Tom goes to the movie house on an English car.  

B. Only Tom and his teacher go to the movie house to see a movie.  

C. They go to the movie house for a meeting(会议).  

D. The old man's son is Tom's English teacher.

选择题