题目内容

火灾报警控制器的电源部分 由主电及备用电源组成,主电具有手动控制开关,而备用不具有手动控制开关。()

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2017年,安徽全省生产总值增长8.5%。()

简单分析市场机制失灵的原因。

医院获得性肺炎最常见致病菌为

A. 革兰阴性杆菌
B. 肺炎球菌
C. 支原体
D. 真菌
E. 金黄色葡萄球菌

You should spend about 40 minutes on this task. Write about the following topic. The only way to reduce the amount of traffic in cities today is by reducing the need for people to travel from home for work, education or shopping. To what extent do you agree or disagree? Give reasons for your answer and include any relevant examples from your own knowledge or experience. Write at least 250 words.

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