第4题: [单项选择]What problem did the man have when he took his road test several years before A. He drove too last. B. He couldn’t park well. C. He made an improper turn. D. He could park well. 参考答案:C 答案解析:[试题分析] 弄清the man failed to the road test的原因。
[详细解答] The man回忆到几年前他参加the road test时,took a left-hand
第7题: [单项选择]下列哪项可能不是油水分离器排出水的含油量超过标准的原因()。 A. 排油控制系统失效,分离出的油污未及时排出,连同排出水一起流出分离器 B. 聚结元件失效;或聚结元件与支座联结不严密,污水短路,不经过聚结元件 C. 配套螺杆泵严重磨损,容积效率下降 D. 专用配套螺杆泵橡胶衬套磨损,容积效率下降,使油水乳化,分离效率降低 参考答案:C