《摩托车排放污染防治技术政策》规定，燃油摩托车发动机机内控制_爱下问搜题

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问题多项选择题

《摩托车排放污染防治技术政策》规定，燃油摩托车发动机机内控制推荐技术措施包括( )。

A．改善摩托车发动机燃烧系统，优化燃烧室设计，提高燃烧效率，降低发动机噪声

B．采用电控燃油喷射技术，精确控制空燃比，使摩托车发动机的燃油经济性、动力性和排放特性达到最佳匹配

C．采用多气门和可变技术，提高发动机的动力性，降低油耗，降低摩托车污染物的排放

D．采用电控燃油喷射技术逐步替代化油器是摩托车发动机生产的发展趋势

E．通过摩托车发动机化油器结构改进和优化匹配，采用化油器混合气电控调节，改善混合气的形成条件，实现混合气空燃比的精细化控制，有效降低摩托车污染物排放

答案

参考答案：A,B,C,D,E

单项选择题

老年瘙痒症最常见的原因是（）

A.季节干燥

B.生活习惯

C.皮肤干燥

D.微生物

E.皮肤病早期

完形填空

Rosa liked making up stories. She was so __1__ that her classmates believed her from time to time. In fact, the whole class believed her! At first she supposed it was __2__. Now, as she got up to __3__ before the class, She knew that make –believe stories had some way of coming back to make you sad.
Rosa’s parents were separated. Nine months out of the year, Rosa lived with her mother in an apartment on Anderson Street. But when summer __4__, she went to her father’s farm in Arizona.
The farm was great! Rosa rode horses and __5__ with some farm work. Her father, however, was so __6__ that he couldn’t find time to go places with her. When she arrived each summer, her father would __7__ her at the airport and take her out to eat. And the day she went back to the __8__ he would always buy her a present.
When summer came to a close, Rosa __9__ to her mother. At school she heard lots of stories her friends told about their family trips. Rosa wished she had a __10__ to talk about.
Not long after __11__ began, Rosa was looking through travel magazines in the school library. They talked about many exciting __12__, like England and Germany. When Rosa’s friends asked what she had done that summer, she made up something that was not __13__. Remembering the travel magazines she had looked at, she told her classmates that she and her father had gone to __14__.
When the class began studying England, Mr. Thomas asked Rosa to tell all the things she could __15__ about her trip to England!

小题13:A interesting B. true C. long D. same