与图B所示气候类型（图中各点的标号表示月份）相符的地区位于（ ） A．①、②海峡

降低生产成本是企业兼并的基本动机之一。某行业一家年产量为200万吨的企业正在对四个兼并方案进行讨论。从最能降低平均生产成本看，根据下图，该企业应该

A．兼并一家年产量为200万吨的同行

B．兼并一家年产量为100万吨的同行

C．兼并一家年产量为300万吨的同行

D．兼并一家年产量为400万吨的同行

数控车床在按F速度进行圆弧插补时，其X、Z两个轴分别按F速度运行。

阅读理解

     More than 10 years ago ,it was difficult to buy a tasty pineapple (菠萝). The fruits that made it to the

UK were green on the outside and , more often than not,hard with an unpleasant taste within. Then in

1996 , the Del Monte Gold pineapple produced in  Hawaii first hit our shelves.    

     The new type of pineapple looked more yellowy-gold than green. It was slightly softer on the outside

and had a lot of juice inside. But the most important thing about this new type of pineapple was that it was

twice as sweet as the hit-and-miss pineapples we had known. In no time, the Del Monte Gold took the

market by storm, rapidly becoming the world's best-selling pineapple variety, and delivering natural levels

of sweetness in the mouth, up until then only found in tinned pineapple.    

     In nutrition it was all good news too.This nice-tasting pineapple contained four times more vitamin C

than the old green variety. Nutritionists said that it was  not only full of vitamins , but also good against

some diseases. People were understandably eager to be able to buy this  wonderful  fruit. The new type

of pineapple was selling fast , and the Del Monte Gold pineapple rapidly became a fixture in the shopping

basket of the healthy eater.    

     Seeing the growing market for its winning pineapple,  Del  Monte tried to keep the market to itself.

But other fruit companies developed similar pineapples. Del Monte turned to law for help, but failed.

Those companies argued successfully that Del Monte's attempts to keep the golden pineapple for itself

were just a way to knock them out of the market.

1. We learn from the text that the new type of pineapple is_________.   

A. green outside and sweet inside    

B.good-looking outside and soft inside    

C. yellowy-gold outside and hard inside    

D.a little soft outside and sweet inside.

2. Why was the new type of pineapple selling well?   

 A. It was rich in nutrition and tasted nice.

B. It was less sweet and good for health.

C. It was developed by Del Monte.

D. It was used as medicine

3. The  underlined  word " fixture" in Paragraph 3 probably refers to something__________.

A. that people enjoy eating    

B. that is always present

C. that is difricult to get        

D. that people use as a gift

4. We learn from the last paragraph that Del Monte __________.

A. allowed other companies to develop pineapples

B. succeeded in keeping the pineapple for itself

C. tried hard to control the pineapple market

D. planned to help the other companies

地面天气图上的等到压线表示的是在哪里的气压相等的连线？（）

A.在地面上

B.在海平面上

C.在观测的大气压力处