零件已损坏达到报废标准，就应即时更换，如果零件已达报废标准，不更新继续使用，会是非常

阅读理解。

    Mr. Reece was a farmer. He and his wife (妻子) grew a lot of things. They worked very

hard. One day, Mr. Reece said to his wife, "let's go to the city next Sunday. We can have

a good lunch there, and then we'll go to the cinema." His wife was very happy when she

heard this, because she and her husband (丈夫) always ate a lot. She didn't like cooking

three times a day.

    They went to the city by train the next Sunday. They walked about for an hour. When

it was twelve o'clock, they wanted to have a meal. They looked at some restaurants. Out

of one of them was a notice (布告), "Lunch12:30 to 2:30, 1.5 dollars."

    "Well, that's good," said Mr. Reece, "we can eat for two hours for 1.5 dollars here.

That's too cheap. This is the place for us."

1. Mr. Reece usually worked in ______. [ ]

A. the fields

B. the city

C. the restaurant

D. the theatre

2. Mr. Reece and his wife went to the city ______. [ ]

A. to have a good lunch

B. to see a film

C. to do some shopping

D. A and B

3. When did Mr. And Mrs. Reece arrive in the city? [ ]

A. At about 11:00.

B. At about 12:00.

C. At about 12:30.

D. At about 2:30.

4. We can see that Mr. Reece ______.[ ]

A. was poor

B. was rich (富的)

C. was healthy

D. was lucky

5. Why did Mr. Reece say that restaurant was the place for them? Because ______. [ ]

A. that was the best restaurant

B. 12:30 to 2:30 was the best time for lunch

C. He thought they could eat a lot and it was cheap

D. They were very tired and hungry

因为存在城乡二元结构，同样的经济收入，在城市生活十分艰难，而在农村却可能过得舒适。城市是市场化的，而从村却有峡谷难当部分非市场因素存在。总体来讲，进城农民工愿意接受很低的工作报酬，就是因为农村生产劳动力的成本比城市低。这也使中国从全球化中获得很多利益。 这段文字意在说明( )。

A．中国从全球化中获得好处的根本原因

B．我国城乡二元结构的存在具有一定的合理性

C．缩小城乡贫富差距，是推进我国城市化建设的必要条件

D．建设社会主义新农村，必须打破城乡二元结构

测定压力变化的电容式传感器如图所示，A为固定电极，B为可动电极，组成一个电容大小可变的电容器．可动电极两端固定，当待测压力施加在可动电极上时，可动电极发生形变，从而改变了电容器的电容．现将此电容式传感器连接到如图所示的电路中，当待测压力增大时

A．电容器的电容将减小

B．电阻R中没有电流

C．电阻R中有从a流向b的电流

D．电阻R中有从b流向a的电流

为了有助于人们选择最满意的城市居住，有关部门实施了一项评选“最舒适城市”的活动。方法是，选择十个方面，包括社会治安、商业设施、清洁程度、绿化程度、教育设施、旅游文化景点等等，每个方面按实际质量的高低，评以1分至10分之间的某一分值，然后求得十个分值的平均数即是这个城市的舒适性指数。
以下哪项是实施上述活动需要预设的前提( )。
(1)城市的各种舒适性质量程度都可以用准确的数字表达。
(2)城市的各种舒适性对于居民来说都是同等重要的。
(3)居民有自由选择居住城市的权利并且大都乐于这样做。

A．仅(1)

B．仅(2)

C．仅(3)

D．(1)、(2)和(3)

某机电公司经销一种小型电动机，销售单价为650元/台，单位商品变动成本为480元/台，固定成本分摊为2.04万元。该种小型电动机的保本销售量是( )。

A．100台

B．110台

C．120台

D．130台