问题 单项选择题

某车间同时散发苯、醋酸乙酯、松节油溶剂蒸汽和余热,为稀释苯、醋酸乙酯、松节油溶剂蒸汽的散发量,所需的室外新风量分别为500000m3/h、10000m3/h、2000m3/h,满足排除余热的室外新风量为510000m3/h。则能刚满足排除苯、醋酸乙酯、松节油溶剂蒸汽和余热的最小新风量是下列何项

A.510000m3/h
B.512000m3/h
C.520000m3/h
D.522000m3/h

答案

参考答案:B

解析: 根据《二版教材》及《工业企业设计卫生标准》GBZ 1—2010规定:苯、醋酸乙酯、松节油溶剂蒸汽均为有害气体,排除稀释所需风量为各自稀释风量总和,应为:500000+10000+2000=512000m3/h,当稀释有害气体与排除余热时,按最大值取值,即以512000m3/h及510000m3/h最大值,应为512000m3/h。

阅读理解

阅读理解。

     In 1977, Jack, an Italian-American who lived in San Francisco, flew from America to Italy to visit his

relatives. On the way, the plane made a one-hour stop to refuel (加油) at the New York Airport.

     Thinking that he had arrived, Jack got out and spent three days in New York, believing he was in

Rome.

     When his relatives were not there to meet him, Jack thought they had been caught in the heavy Roman

traffic mentioned in their letters. While looking for their address, Jack could not help noticing that

modernization had changed most, if not all, of the ancient city's landmarks. He also noticed that many

people spoke English with strong American accent. However, he just thought that Americans got

everywhere. He also believed that so many street signs were written in English especially for the

Americans. Jack spoke very little English himself so he asked a policeman in Italian the way to the bus

station. As chance would have it, the policeman came from Italy and replied in the same language. After

twelve hours traveling round on a bus, the driver handed him over to a second policeman. After brief

argument with the policeman, Jack was very surprised to find that the Rome police had employed someone who did not speak his mother tongue.

     Jack did not believe he was told that he was in New York. In order to get on a plane to San Francisco, the policeman raced him to the airport in a police car with sirens (报警器) screaming. "See," he said to his interpreter. "I know I'm in Italy. That's how they drive."

1. Where did Jack live?

A. In Italy              

B. In San Francisco    

C. In New York        

D. The story doesn't mention

2. Why did Jack spend three days in New York?

A. He thought he had arrived in Italy

B. He did not want to go to Italy

C. He wanted to see some relatives first in New York

D. He wanted to have short rest in New York

3. Which of the following is Not true?

A. The first policeman could speak Italian fluently

B. The second policeman could not speak Italian at all

C. Jack had a brief argument with the second policeman

D. Jack could speak much English

多项选择题