雾霾是雾和霾的统称。雾是空气中的水汽超过饱和量,与空气中微小的灰尘颗粒结合,凝结

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问题:

雾霾是雾和霾的统称。雾是空气中的水汽超过饱和量,与空气中微小的灰尘颗粒结合,凝结成小水滴,悬浮在近地面的空气层里的天气现象;霾是因大量烟、尘等微粒悬浮而形成的浑浊现象,核心物质是空气中悬浮的微尘。2013年,持续困扰全国多地的“雾霾天”,几乎成了全民热议的焦点。据此回答下列各题。

小题1:关于我国雾霾的成因,叙述正确的是

A.冬季寒潮活动频繁

B.工业生产及交通运输排放大量的污染物

C.多气旋活动,雨雪较多

D.近地面气温较高,大气不稳定小题2:治理雾霾天气应采取的主要措施包括

①调整能源消费结构 ②淘汰落后产能,优化产业结构 

③加大环保执法力度 ④在大城市禁止新增机动车

A.①②③

B.①②④

C.①③④

D.②③④

考点:主要环境问题的产生和表现主要环境问题的危害及解决办法
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比正数小的数一定是负数.______.(判断对错)

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某220kV线路,无时限电流速断保护动作使C相断路器跳闸。试分析在雷雨大风和冬季覆冰各可能存在什么故障?并简述其故障范围。

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小偷偷偷打开邻居家的保险柜,见柜中空无分文,使把门关好就回家了,小偷的行为是:

A.盗窃罪预备

B.盗窃罪既遂

C.盗窃罪未遂

D.不构成犯罪

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软件开发的每个过程都将产生各种产品,如文档、手册和程序,它们共同构成一个完整的软件系统,这种构成就是______。

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Vienna was one of the music centers of Europe during the classical period, and Haydn, Mozart, and Beethoven were all active there. As the (1) of the Holy Roman Empire (which included parts of present-day Austria, Germany, Italy, Hungary, Czech and Slovakia), it was a (2) cultural and commercial center (3) a cosmopolitan character. Its population of almost 250,000 (in 1800) made Vienna the fourth largest city in Europe. All three (4) masters were born elsewhere, but they were (5) to Vienna to study and to seek (6) . In Vienna, Haydn and Mozart became close friends and influenced each other’s musical (7) . Beethoven traveled to Vienna at sixteen to play for Mozart; at twenty-two, he returned to study with Haydn.

Aristocrats from all over the Empire spent the winter in Vienna, sometimes bringing their private (8) . Music was an important part of court life, and a good orchestra was a (9) of prestige. Many of the nobility were excellent musicians.

Much music was heard in (10) concerts where aristocrats and wealthy commoners played (11) professional musicians. Mozart and Beethoven often earned money by performing in these intimate concerts. The nobility (12) hired servants who could (13) as musicians. An advertisement in the Vienna Gazette of 1789 (14) : " Wanted, for a house of the gentry, a manservant who knows how to play the violin well. "

In Vienna there was also (15) music, light and popular in (16) . Small street bands of wind and string players played at garden parties or under the windows of people (17) to throw (18) money. Haydn and Mozart wrote many outdoor entertainment (19) , (20) they called divertimentos or serenades. Vienna’s great love of music and its enthusiastic demand for new works made it the chosen city of Haydn, Mozart and Beethoven.

6()

A.admission

B.acknowledgement

C.recognition

D.appraisal

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