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凝汽器的投用步骤是怎样的？

答案

参考答案：

全面检查凝汽器系统，循环水进、出口电动蝶阀送上电源，开关良好，各放水门关闭，顶部放空气门开启，

a）全开出水门。

b）缓慢开启进口门充水赶空气，顶部放空气，待有水流出后关闭，全开进水门。

c）全面检查并监视温升情况。

多项选择题

下列专项规划在草案上报审批前编写该规划有关环境影响的篇章或者说明的是（）。

A.设区的市级以上海域建设、开发利用规划

B.设区的市级以上防洪、治涝、灌溉规划

C.设区的市级以上土地利用总体规划

D.设区的市级以上种植业发展规划
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单项选择题

The number of speakers of English in Shakespeare’s time is estimated to have been about five million. Today it is estimated that some 260 million people speak it as a native language, mainly in the United States, Canada, Great Britain, Ireland, South Africa, Australia and New Zealand. In addition to the standard varieties of English found in these areas, there are a great many regional and social varieties of the language as well as various levels of usage that are employed both in its spoken and written forms.
In fact, it is impossible to estimate the number of people in the world who have acquired an adequate working knowledge of English in addition to their own languages. The purpose for English learning and the situations in which such learning takes place are so varied that it is difficult to explain and still more difficult to judge what forms an adequate working knowledge for each situation.
The main reason for the widespread demand for English is its present-day importance as a world language. Besides serving the indefinite needs of its native speakers, English is a language in which some of important works in science, technology, and other fields are being produced, and not always by native speakers. It is widely used for such purposes as meteorological and airport communications, international conferences, and the spread of information over the radio and television networks of many nations. It is a language of wider communication for a number of developing countries, especially former British colonies. Many of these countries have multilingual populations and need a language for internal communication in such matters as government, commerce, industry, law and education as well as for international communication and for entrance to the scientific and technological developments in the West.

What type of developing countries would be most likely to use English

A. Those geographically close to the United States.
B. Those interested in the culture of the United States.
C. Former colonies of Great Britain.
D. Countries where international conferences are held.
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