铁矿石还原速度的快慢，主要取决于（）和矿石的特性。

近年来，巴勒斯坦地区冲突不断，造成了中东地区的极大的不稳定，你知道造成这种局面的核心问题是[ ]

A、调和犹太民族和阿拉伯民族之间的矛盾

B、联合国关于巴勒斯坦地区分治方案的合法性

C、巴勒斯坦人民有建立家园的权力

D、西方大国公平对待巴以双方

通过树间的空隙，有时可以看到平整的田畴，在树寨的边沿，在巨人般的枫叶林和菩提林的隐蔽下，佛寺的屋顶和金塔_____耀眼的金光。

A．闪出

B．射出

C．发出

D．出现

Many of the most damaging types of weather begin quickly, strike suddenly, and disappear rapidly, destroying small areas while leaving neighboring areas untouched．Such event as a tornado struck the northeastern part of Edmonton, Alberta, in July 1987．Total damages from the tornado went beyond $250 million, the highest ever for any Canadian storm．

Traditional computer models of the atmosphere have limited value in predicting short-lived local storms like the Edmonton tornado, because the available weather data are generally not detailed enough to allow computers to study carefully the slight atmospheric changes that come before these storms．In most nations, for example, weather-balloon observations are taken just once every twelve hours at places separated by hundreds of miles．With such limited data, traditional forecasting models do a much better job predicting general weather conditions over large areas than they do forecasting specific local events．

Until recently, the observation intensive method needed for exact, very short-range forecasts, or “Nowcasts,” was not possible．The cost of equipping and operating many thousands of conventional weather stations was extremely high, and the difficulties concerned in rapidly collecting and processing the weather data from such a network were hard to overcome．

Fortunately, scientific and technological advances have overcome most of these problems．Radar systems and satellites are all able to make detailed, nearly continuous observation over large areas at a lower cost．Communications satellites can send out data around the world cheaply and immediately, and modern computers can quickly collect and analyze this large amount of weather information．

Meteorologists（气象学者）and computer scientists now work together to design computer programs and video equipment able to change weather data into words and graphic displays that forecasters can understand easily and quickly．As meteorologists have begun using these new technologies in weather forecasting offices, Nowcasting is becoming a reality．

1．Why can’t traditional computer models predict short-lived local storms?

A．The weather data people collect are often wrong．

B．Detailed weather data in some small areas are not available．

C．The computers are not advanced enough to predict them．D．The computers are not used to forecast specific local events．

2．The word “Nowcast” in Paragraph 3 means ________．

A．a network to collect storm data     

B．a way of collecting weather data

C．a more advanced system of weather observation

D．a forecast which can predict weather in the small area

3．What can make “Nowcasts” a reality according to the passage?

A．Scientific and technological advances． B．Advanced computer programs．

C．Computer scientists．              D．Meteorologists．

4．What does the passage mainly talk about?

A．The advantages of “Nowcasts”．        B．A tornado in Edmonton, Alberta．

C．The difficulty in predicting tornado．  D．A great development in weather forecast．

下列关于防水卷材的选择说法错误的是（）

A.防水卷材可按合成高分子防水卷材和高聚物改性沥青防水卷材选用，其外观质量和品种、规格应符合国家现行有关材料标准的规定

B.应根据当地历年最高气温、最低气温、屋面坡度和使用条件等因素，选择耐热度、低温柔性相适应的卷材

C.应根据地基变形程度、结构形式、当地年温差、日温差和振动等因素，选择拉伸性相适应的卷材

D.种植隔热屋面的防水层应选择耐紫外线、耐霉烂的防水卷材

以下循环的执 【9】 。
k=0
Do Until k＞=10
k=k+1
Loop