工程项目风险管理工作中，风险量是衡量（）的一个变量。A．风险大小 B．风险事件可能发

新颁布的课程标准有哪些主要特点

阅读理解。

     Michael Fish may soon be replaced as a weather forecaster by something truly fisher-the shark (鲨鱼).

Research by a British biology student suggests that sharks could be used to predict storms.

     Lauren Smith, 24, is close to completing her study on shark's ability to sense pressure. If her studies

prove the theory, scientists may be able to monitor the behavior of sharks to predict bad weather.

     Miss Smith had previously studied the behavior of lemon sharks in the Bahamas. She then used their

close relatives, lesser spotted dogfish, for further research at Aberdeen University.

     Her work-thought to be the first of its kind to test the pressure theory-resulted from the observation

that juvenile black tip sharks off Florida moved into deeper water ahead of a violent storm in 2001.

     Miss Smith said, "I've always been crazy about traveling and diving and this led me to an interest in

sharks." "I was delighted to have been able to research in the area for my degree. I know there's so much

more we need to understand-but it certainly opens the way to more research."

     It has been discovered that a shark senses pressure using hair cells in its balance system. At the Bimini

Shark Lab in the Bahamas, Miss Smith fixed hi-tech sensors to sharks to record pressure and temperature,

while also tracking them using GPS (Global Positioning System) technology.

     In Aberdeen, she was able to study the effects of tidal (潮汐的) and temperature changes on dogfish-

none of which were harmed. She also used a special lab which can mimic(模拟) oceanic pressure changes

caused by weather fronts.

     She is due to complete her study and graduate later this year. She says she will be looking for a job which

will give her the chance to enrich her experience of shark research.

1. The passage is most probably taken from _____. [ ]

A. a short-story collection

B. a popular science magazine

C. a research paper

D. a personal diary

2. What do we learn from the first two paragraphs of the passage? [ ]

A. Sharks may be used to predict bad weather.

B. Sharks' behavior can be controlled.

C. Michael Fish is not qualified for his job.

D. Lauren Smith will become a weather forecaster.

3. Lauren Smith conducted her research by _____.[ ]

A. removing hair cells from a shark's balance system

B. measuring the air pressure of weather fronts

C. recording sharks' body temperature

D. monitoring sharks' reaction to weather changes

4. What is the passage mainly about? [ ]

A. A popular way of forecasting weather.

B. A new research effort in predicting storms.

C. Biologists' interest in the secrets of sharks.

D. Lauren Smith's devotion to scientific research.

简述冶炼40Cr的操作要点（含EAF、LF）。

2006年虽然宁夏中部干旱带遭遇严重旱灾，但在各级党委政府的正确引导下，广大农民抢抓农时，积极调整种植结构，发展优势特色农产品，全区农作物播种面积稳中有增，粮食生产夏减秋增，在全区粮食生产前两年连续获得大丰收的情况下，2006年粮食播种面积1192.8万亩，比上年增长2.5%；粮食总产量310.94万吨，比上年增长3.7%，创历史最高水平。其中，夏粮播种面积397.64万亩，因结构调整和严重干旱比上年减少了19.3%，虽然全区夏粮平均亩产 201.5公斤，比上年增加29.8公斤，增长17.4%，但总产量仅达到80.24万吨，比上年减产4.4万吨，减产5.2%；秋粮由于水稻、马铃薯面积大幅度增长，水稻、马铃薯面积均达历史最高水平，播种面积达到795.16万亩，比上年增长18.5%，山区虽然生产条件差，秋粮前期受早严重，后期遇早霜冻，秋粮作物单产下降，但由于高产作物马铃薯面积增加较多，因而对总产影响不大，秋粮产量230.70万吨，增产7.2%。2006年全区粮食产值比上年增长4.1%，其中仅薯类产值比上年增长18.8%。

在确保粮食生产稳定，适度控制粮食种植面积的基础上，全区经济作物种植面积和产量增加较快，蔬菜、枸杞和西甜瓜等经济作物种植面积和产量大幅度增加。2006年，受到蔬菜价格持续上扬的拉动，以及枸杞价格不断攀升的影响，全年蔬菜播种面积达到92.1万亩，产量 220.05万吨，分别比上年增长19.7%和19.8%；枸杞播种面积33.8万亩，产量5.15万吨，分别比上年增长8.7%和1.9%。由于受旱灾影响，中部干旱带加大了政策导向力度，因地制宜大力推广硒砂瓜的种植，种植规模呈迅速扩张之势，成为当地农民脱贫致富的新亮点。全区共种植了西甜瓜66.6万亩，产量达到83.75万吨，分别比上年增长74.4%和124.5%。药材面积稳定增长，药材面积22.4万亩，增加2.7万亩，增长13.7%。其中，山区药材面积18万亩，增加2.5万亩，增长 13.7%，主要是甘草种植面积增长。2006年，宁夏各地突出发展特色优势产业，进一步优化了农业种植结构，对农民收入增长起到了重要作用。

2005年宁夏夏粮总产量为（）。

A．80.24万吨

B．310.94万吨

C．84.64万吨

D．83.75万吨

采用市场法评估资产价值时，需要以类似或相同资产为参照物，选择的参照物应该是( )。

A．全新资产

B．旧资产

C．与被评估资产的成新率相同的资产

D．全新资产，也可以是旧资产