(2013·高考安徽卷,B)Using too much water or th

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问题:

(2013·高考安徽卷,B)Using too much water or throwingrubbish into our rivers are clear ways that humans can put our water supply in danger,but we also affect our water supply in less obvious ways.You may wonder how paving(铺砌) a road can lead to less useable fresh water.A major part of the water we use every day is groundwater.Groundwater does not come from lakes or rivers.It comes from underground.The more roads and parking lots we pave,the less water can flow into the ground to become groundwater.

Human activity is not responsible for all water shortages(短缺).Drier climates are of course more likely to have droughts(干旱) than areas with more rainfall,but in any case,good management can help to make sure there is enough water to meet our basic needs.

Thinking about the way we use water every day can make a big difference,too.In the United States,a family of four can use 1.5 tons of water a day! This shows how much we depend on water to live,but there’s a lot we can do to lower the number.

You can take steps to save water in your home.To start with,use the same glass for your drinking water all day.Wash it only once a day.Run your dishwasher (洗碗机)only when it is full.Help your parents fix any leaks in your home.You can even help to keep our water supply clean by recycling batteries instead of throwing them away.

小题1:Which of the following is most likely to lead to less groundwater?

A.Using river water.

B.Throwing batteries away.

C.Paving parking lots.

D.Throwing rubbish into lakes.小题2:What can be inferred from the text?

A.All water shortages are due to human behavior.

B.It takes a lot of effort to meet our water needs.

C.There is much we can do to reduce family size.

D.The average family in America makes proper use of water.小题3:The last paragraph is intended to________.

A.show us how to fix leaks at home

B.tell us how to run a dishwasher

C.prove what drinking glass is best for us

D.suggest what we do to save water at home小题4:The text is mainly about________.

A.Why paving roads reduces our water

B.how much we depend on water to live

C.why droughts occur more in dry climates

D.how human activity affects our water supply

考点:科教类阅读
题型:阅读理解

I.科学家一直致力于“人工固氮”的方法研究。目前合成氨的技术原理为氮气和氢气在高温高压催化剂条件下生成氨气,一定条件下,向一个2L的密闭容器中充入2molN2和6molH2,反应达平衡时生成NH3的浓度为0.5mol/L,并放出QkJ热量,该反应的热化学方程式可表示为______。

II.已知:N2O4(g)2NO2(g) △H=+57.20kJ/mol。

在1000C时,将0.100molN2O4气体充入lL恒容抽空的密闭容器中,每隔一定时间对该容器内的物质浓度进行分析得到下表数据:

时间(s)020406080
c(N2O4)/mol0.100c10.050c3c4
c(NO2)/mol0.0000.060c20.1200.120
 

(1)该反应的平衡常数表达式为______;从表中数据分析:c1______c2、c3______c4(选填“>”、“<”或“=”)。

(2)在右图中画出并标明此反应中N2O4和NO2的浓度随时间变化的曲线。

(3)在上述条件下,从反应开始至达到化学平衡时,四氧化二氮的平均反应速率为______。

(4)若起始时充入NO2气体0.200mol,则达到平衡时NO2气体的转化率为______;其它条件不变时,下列措施能提高NO2转化率的是______ (填字母)。

A.减小NO2的浓度 B.降低温度  C.增加NO2的浓度

D.升高温度 E.再充入一定量的He

(5)向容积相同、温度分别为T1和T1的两个密闭容器中分别充入等量NO2,发生反应:2NO2N2O4(g)(g) △H=-57.20kJ/mol。恒温恒容下反应相同时间后,分别测得体系中NO2的百分含量分别为a1和a2。巳知T1<T2,则a1____a2(选择A、B、C、D填空)。

A.大于    B.小于    C.等于   D.以上都有可能

题型:阅读理解

吞咽困难的病人,麻醉诱导需注意发生()

A.呼吸困难

B.心动过速

C.呕吐与误吸

D.血压下降

E.二氧化碳蓄积

题型:阅读理解

勒盼多之役

题型:阅读理解

突触是一个细胞。

题型:阅读理解

卡铂()

A.抗雌激素类药

B.抗代谢药物

C.抗肿瘤抗生素

D.抗肿瘤植物有效成分

E.抗肿瘤金属配合物

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