【题目】In this lecture,I can only give you a purely___view of how we can live life to the full and make some suggestions about the future
A.private
B.personal
C.unique
D.different
科目:高中地理 来源: 题型:
【题目】语法填空
阅读下面材料,在空白处填入1个适当的单词或括号内单词的正确形式。
Umbrella is what we easily forget and leave behind in our daily life. When the weather is fine, we certainly don’t think of it; only when it’s raining, we’ll carry it purposefully. But as soon as the rain stops, most likely we’ll forget 1 we’ve put it. It has to wait patiently and pitifully for 2 owner to claim it, otherwise it’ll remain alone as a deserted umbrella.
Once I suddenly found my longtime 3 (use) umbrella "disappeared" I really got lost and regretted quite some time 4 my own carelessness.
Several days later, out of my 5 (expect), I saw it quietly stand in a corner of the house where I worked. I was extremely glad to regain it. Looking carefully at it, though it was so familiar 6 me, I found for the first time its wooden handle 7 (wear)out as a result of repeated rain-wash for years. I sought for it only when I needed it. It occurred to me that I should have paid 8 (much) attention to it.
It sets me thinking. Around us there are always people giving us support in silence just like 9 umbrella that protects us from the rain or any wretched weather. Will gou think of those individuals 10 have helped you get through difficlty when you are leading a comfortable life?
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【题目】 I don’t like any humor in serious speech because I can’t think of any _______ where this would be beneficial
or useful.
A. convenience B. consequence
C. circumstance D. coincidence
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【题目】马蛔虫受精卵与菠菜根尖分生区细胞的有丝分裂不同,其结构基础是因为菠菜根尖分生区细胞( )
A.有叶绿体和细胞壁 B.有细胞壁和液泡
C.有叶绿体和液泡 D.有细胞壁、无中心体
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【题目】
Many Americans concerned about air pollution are demanding cleaner and cheaper supplies of energy. The demand has resulted in increased research about ethanol fuel. Ethanol is an alcohol that can be mixed with gas. It burns up most of the pollutants in gas. It replaced some of the chemicals that are known to cause cancer.
Some experts say that in the future ethanol will replace some of the oil imported into America. Today ethanol is less than one percent of the total American fuel supply. The head of the National Corn Growers Association, Kieve Hars, says ethanol will provide twenty five percent of the fuel supply by 2010. The organization is involved in the production of ethanol because it can be made from corn.
One company in American Midwest says it is starting to produce ethanol because of demands from people and from the government. The Congress approved the Clean Air Act in 1990. The company says this means the market for ethanol will expand. The company is a major producer of corn starch (淀粉) that can be used to make ethanol.
At Texas University, Professor Mark Holzapple produces ethanol from materials found in solid waste. He has developed a way to turn materials like paper into simple sugar. He then uses yeast (酵母) to turn the sugar into ethanol. Professor Holzappple says two hundred liters of ethanol fuel can be produced from one ton of solid waste.
A professor at the University of Arkansas, John Geddie, is exploring another way to make ethanol. He is using acids on paper material. He says a large factory could produce ethanol from waste paper about the same cost of that of gasoline.
Environmentalists support the use of ethanol because it turns waste into a useful product. Professor Holzapple says law makers in industrial nations need to support the development of this renewable fuel of the future.
根据上面的短文填空,一空一词。
Title: Ethanol: 【1】__________________________ and Cheap Fuel
Definition and uses | A kind of 【2】 __________ | It can be mixed with gas. |
It helps remove some 【3】 _________ pollutants from gas. | ||
It replaces some chemicals known to cause 【4】 ________. | ||
It will take the place of 【5】 ___________________ . | ||
Production | Ethanol | From starch |
From material found in solid 【6】 _________ like paper | ||
Opinions | The public | Demand the production and use of ethanol |
The 【7】 ________________ | Approve the Clean Air Act | |
The 【8】 ________________ | Meet the expanding market | |
Environmentalists | 【9】 __________________ the development of it | |
Conclusion | Ethanol, as a renewable fuel, will be produced and used more widely in the world, and it needs the support of law 【10】 ________________. |
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【题目】It took us quite a long time to get to the amusement park.It was___journey
A.three hour
B.a three-hours
C.a three-hour
D.three hours
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【题目】在25℃时,某稀溶液中由水电离产生的c(OH-)=10-10mol/L。下列有关该溶液的叙述正确的是( )
A.该溶液一定呈酸性
B.该溶液中的c(H+)可能等于10-5
C.该溶液的pH可能为4,可能为10
D.该溶液有可能呈中性
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【题目】在50 mL 0.2 mol·L-1 CuSO4溶液中插入两个电极,通电电解(不考虑水分蒸发)。则:
(1)若两极均为铜片,试说明电解过程中CuSO4溶液的浓度________(填“增大”、“减小”或“不变”)。
(2)若阳极为纯锌,阴极为铜片,阳极反应式是________________;
(3)若阳极为纯锌,阴极为铜片,如不考虑H+在阴极上放电,当电路中有0.04 mol e-通过时,阴极增重________g,阴极上的电极反应式是___________________。
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科目:高中地理 来源: 题型:
【题目】关于原子轨道的说法正确的是( )
A.凡是中心原子采取sp3杂化轨道成键的分子其立体构型都是正四面体形
B.CH4分子中的sp3杂化轨道是由4个氢原子的1s 轨道和碳原子的2p轨道杂化而形成的
C.sp3杂化轨道是由同一个原子中能量相近的s 轨道和p轨道杂化形成的一组能量相近的新轨道
D.凡AB3型的共价化合物,其中心原子A均采用sp3杂化轨道成键
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