一车间变电所,已知总负荷Ps为560kW,U N=380V,计算推荐需用系数Kx取0

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问题:

一车间变电所,已知总负荷Ps为560kW,U N=380V,计算推荐需用系数Kx取0.4, cosα=0.7,若选单台变压器,求:

若将cosα提高为0.9应选多少套BW-0.4-12-3。

考点:电力考试110KV及以下电器设备选择110kV及以下电器设备选择试卷3
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为了使片剂表面光滑平整

A.包隔离层
B.包粉衣层
C.包糖衣层
D.包有色糖衣层
E.打光

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根据《电子文件归档与管理规范》,对磁性载体每满()年进行一次抽样机读检验,抽祥率不低于10%。

A、1

B、2

C、4

D、6

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If you are a high school senior graduating and looking to enter college in 2006, you will take the new exam.

The biggest change to the SAT (美国学术能力倾向测验) will be the introduction of a new writing section. The writing section will consist of two parts: an essay and a multiple-choice section. Students will be given 25 minutes to respond to a prompt (提示) and construct a well-organized essay that effectively deals with the task. The essay question may require students to complete a statement, to react to a quote, or to agree or disagree with a point of view. In any case, a good essay will support the chosen position with specific reasons and examples from literature, history, art, science, current affairs, or even a student's own experiences.

Essays will be scored based on the procedures for the current SAT II: Writing Test. Essays will be graded by two independent readers On a scale of 1~6, and their two scores will be combined to form an essay subscore that ranges from 2 to 12. Should the readers' scores vary by more than 2 points, a third reader will score the essay; The readers will be high school teachers and college professors who teach composition. To ensure that essays will be scored in a timely manner, they will be scanned and made available to readers on the Internet for grading purpose.

The writing section will also include multiple-choice grammar and usage questions. Some of these questions will call upon students to improve given sentences and paragraphs. Others will present students with sentences and require them to identify mistakes in diction (措辞), grammar, sentence construction, subject-verb agreement, proper word usage.

The highest possible score on the new writing section will be 800. Scores on the essay and multiple-choice section will be combined to produce a single score. A writing subscore will also be assigned. The highest possible scores on the Critical Reading and Math sections will remain 800 each, making 2,400 a perfect score on the new SAT.

小题1:Which parts are included in the writing section of SAT according to the passage?

A.Essay and multiple-choice.

B.Essay and critical writing.

C.Multiple-choice and math.

D.Multiple-choice and literature.小题2:In Paragraph 3, the writer of this passage mainly described _________.

A.application of the Internet in scoring the essay

B.relationship between high tech and testing

C.cheating in the essay scoring procedure

D.the scoring procedure of the essay小题3: Which of the following statements is NOT true according to the passage?

A.The SAT is designed for high school seniors wishing to enter a college.

B.The writer criticized the multiple-choice in the SAT.

C.Good specific examples are encouraged in essay writing.

D.The SAT consists of the Critical Reading, Math and the Writing sections.小题4:Which of the following would be the best title for this passage?

A.The new SAT scoring.

B.Language testing reform.

C.College entrance exam reform.

D.The new writing section of SAT.

题型:问答题

矿井井下带式输送机可以使用橡胶输送带

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以下哪项疾病与脉络膜新生血管有关()

A.湿性年龄相关性黄斑变性

B.Stargardt病

C.干性年龄相关性黄斑变性

D.中心性浆液性脉络膜视网膜病变

E.非缺血型视网膜中央静脉阻塞

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