问题 问答题 简答题

对于氧化锆氧量计,如果仪表正常,哪些情况会使表计指示摆动大?

答案

参考答案:

仪表本身正常而指示值摆动较大的可能原因有:

(1)运行人员操作不当,用启停给煤机的办法来调整汽压,使扰动量过大。

(2)改变磨煤机运行方式时,送风量未进行相应的调整,使燃烧情况不好。

(3)风量不足,低氧燃烧时,可燃气体(CO)增加很大,使仪表指示不正常。

阅读理解

Do you know what school life is like in Singapore? In Singapore, a class only lasts half an hour, but there are no breaks between classes. The students only have a 30-minute tea break after 3 or 4 classes.

They do not do eye exercises. Yao Suyu said our eye exercises were unfamiliar(不熟悉)to her. “I’d like to introduce them to our school,” she said. “They’re very useful!”

In Singapore school ends at 1:50 p.m. But students joined other classes after school such as dance clubs and choir(合唱团). Yao says she joins dance club twice a week and it lasts from 1:30 to 5:30 p.m.

Singapore’s population(人口)includes Chinese, Indians(印度人), Malays(马来人 )and Westerners. But there is no special school for any one of the groups. The students in Yao’s school are mainly Chinese, Indians and Malays. “The Indian students take Indian language classes when we study Chinese,” said Yao. “But if an Indian student is interested in Chinese, he or she can study it, too.”

In Singaporean schools, teachers teach in English. It’s the official(官方的)language in Singapore. Singaporean students have to take different courses after school. Like most Singaporean students, Yao took other courses in Chinese, math and English.

小题1:How long does a class last in Singapore?

                                                                          

小题2:Do the students do eye exercises in Singapore?

                                                                          

小题3:When does school end in Singapore?

                                                                          

小题4:What does Singapore’s population include?

                                                                          

小题5:In which language do teachers teach in Singaporean schools?

                                                                        

名词解释