判断题：调节器的正反作用和调节阀的正反作用意义相同。

题型：问答题

在诉讼过程中，县国税局改变了原来作出的行政处罚决定，但甲公司并未撤诉，此时法院是否应当驳回起诉

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题型：选择题

揭开中 * * 抗战序幕的事件是[ ]

A．九一八事变

B．卢沟桥事变

C．西安事变

D．日本侵占东北三省

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题型：简答题

为什么说“一国两制”是两岸统一的最佳方式？

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题型：完形填空

Everyone in business has been told that success is all about attracting and retaining (留住) customers. It sounds simple and achievable. But,     , words of wisdom are soon forgotten. Once companies have attracted customers they often
  the second half of the story. In the excitement of beating off the competition, negotiating prices, securing orders, and delivering the product, managers tend to become carried away. They forget what they regard as the boring side of business—
      that the customer remains a customer.
    to concentrate on retaining as well as attracting customers costs business huge amounts of money annually. It has been estimated that the average company loses between 10 and 30 per cent of its customers every years. In constantly changing     , this is not surprising. What is surprising is the fact that few companies have any idea how many customers they have lost.
Only now are organizations beginning to wake up to those lost opportunities and calculate the
implications. Cutting down the number of customers a company loses can make a big
  in its performance. Research in the US found that a five per cent decrease in the number of defecting (流失的) customers led to      increases of between 25 and 85 per cent.
In the US, Domino’s Pizza estimates that a regular customer is worth more than $5,000 over ten years. A customer who receives a poor quality product or service on their first visit and      never returns, is losing the company thousands of dollars in
  profits (more if you consider how many people they are likely to tell about their bad experience).
The logic behind cultivating customer      is impossible to deny. “In practice most companies’ marketing effort is focused on getting customers, with little attention paid to      them”, says Adrian Payne of Cornfield University’ School of Management. “Research suggests that there is a close relationship between retaining customers and making profits.      customers tend to buy more, are predictable and usually cost less to service than new customers. Furthermore, they tend to be less price     , and may provide free word-of-mouth advertising. Retaining customers also makes it
    for competitors to enter a market or increase their share of a market.

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题型：单项选择题

来自密歇根大学等多家机构的科学家说，他们利用设在夏威夷的地面望远镜和在太空轨道上的哈勃望远镜，在附近星系中发现了3个黑洞，并对其他可能存在黑洞的星系进行了进一步观测，最终找到了宇宙大部分星系中存在的黑洞，每个黑洞大小与它所在的星系大小成正比的证据。

密歇根大学的一个国际天文学家小组通过观测附近30个左右的星系，新发现了3个质量相当于5 000万个太阳到5亿个太阳的黑洞，其中两个位于狮子星座，一个位于室女座。哈佛—史密斯索尼天体物理中心一个研究小组利用多颗X光卫星观测了9对比较特殊的双星系统，每对星中都有一颗普通星所含物质被附近另一颗密度极大的天体吸引过去。在X光图像中，9个普通星体中所含的气态物质都被吸引到高密度天体^①外呈螺旋型按一个方向向中心靠拢。高温星体气体接近高密度天体^②，就突然消失，其X图像表现为发亮的碟形中央有一黑点，而接近高密度天体^③时，高温气体会与天体发生碰撞，在X图像上表现为发亮的碟形中央有一个更亮的往外发射的亮点。研究人员认为其中4个黑点代表黑洞，而另外5个亮点代表中子星。

对文中所提供的信息理解不正确的一项是（）。

A．哈佛研究小组观测黑洞的手段不同于密歇根大学国际天文学家小组的手段

B．哈佛研究小组观测的9对星中，每一对中都有一颗普通星被附近的一颗密度极大的天体吸引过去

C．哈佛研究人员观测到，高温星体气体在接近高密度天体时，有时会和天体发生碰撞，有时则不会

D．哈佛研究人员认为，X光图像中4个黑点代表4个黑洞，5个亮点代表5个中子星

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调节器的正反作用和调节阀的正反作用意义相同。

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