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问题 多项选择题

电力系统应按规定装设控制保护和安全自动装置，为了保持系统稳定，对功率过剩与频率上升一侧采取以下自动措施( )。

A．对发电机快速减力；
B．切除部分发电机；
C．在预定地点将系统解列；
D．投入动态电阻制动。

答案

参考答案：A,B,D

改错题

请找出下列短文中的错误，并直接在短文中改正。（每小题1.5分，共15分）

改错格式（要求）

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1. 每处错误及其修改均仅限一词；2. 只允许修改10处，多者（从11处起）不计分。

When left college, Daisy got a good job in a company. But after she had  been worked there for some years, she decided to change. So she put notice in  several newspapers and said what experience she had and the kind of job she  would like to have. One of the answer she accepted was from a man waslooking for a job, too. This man wrote to her,“ madam, when you get a new job, be kind enough to give your name and address to your present boss as I have been trying to find a position as yours for a long time.” After she read the letter, she suddenly realized that which she had done was real foolish.
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单项选择题

根据所提供的图像，可除外下列哪种诊断（）

A.小肠憩室炎

B.穿孔

C.缺血坏死性肠炎

D.大肠憩室炎

E.以上都不是
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