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采用汽包炉协调控制包括哪些系统？

答案

参考答案：

采用汽包炉时，单元机组协调控制系统包括单元机组主控制系统和各局部控制系统（如燃烧控制系统、给水控制系统、气温控制系统和汽轮机调速系统等）。

单元机组主控制系统由负荷指令处理装置和机炉主控制系统组成，它是协调汽轮机、锅炉动作并按受外部负荷指令的装置

单项选择题

The idea that some groups of people may be more intelligent than others is one of those hypotheses that dare not speak its name. But Gregory Cochran is (1) to say it anyway. He is that (2) bird, a scientist who works independently (3) any institution. He helped popularize the idea that some diseases not (4) thought to have a bacterial cause were actually infections, which aroused much controversy when it was first suggested.

(5) he, however, might tremble at the (6) of what he is about to do. Together with another two scientists, he is publishing a paper which not only (7) that one group of humanity is more intelligent than the others, but explains the process that has brought this about. The group in (8) are a particular people originated from central Europe. The process is natural selection.

This group generally do well in IQ test, (9) 12-15 points above the (10) value of 100, and have contributed (11) to the intellectual and cultural life of the West, as the (12) of their elites, including several world-renowned scientists, (13) . They also suffer more often than most people from a number of nasty genetic diseases, such as breast cancer. These facts, (14) , have previously been thought unrelated. The former has been (15) to social effects, such as a p tradition of (16) education. The latter was seen as a (an) (17) of genetic isolation. Dr. Cochran suggests that the intelligence and diseases are intimately (18) . His argument is that the unusual history of these people has (19) them to unique evolutionary pressures that have resulted in this (20) state of affairs.

4（）

A.subsequently

B.presently

C.previously

D.lately
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单项选择题

按照《中华人民共和国担保法》的有关规定，担保人对偿还被担保人的贷款（），一旦借款人无力履行还款义务，银行可以要求担保人履行担保义务，代替借款人偿还贷款

A、负有连带责任

B、负有部分责任

C、负有共同责任

D、负有全部责任
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