【名词&注释】
鄱阳湖(poyang lake)、科学家(scientist)、光电效应、爱因斯坦(einstein)、经典物理学(classical physics)、普朗克(planck)、世纪初(beginning of century)、光量子假说、子房壁(ovary wall)
[单选题]11．20世纪初(beginning of century)，提出光量子假说，解决经典物理学无法解释的光电效应问题的科学家是
A. 普朗克
B. 麦克斯韦
C. 玻尔
D. 爱因斯坦
查看答案&解析
举一反三：
[单选题]What does the text tell us about Fijian people ?
A. They invented “Fiji time” for visitors
B. They stick to a traditional way of lift
C. They like to travel from place to place
D. They love taking adventures abroad
[单选题]鄱阳湖冬、夏水面景象变化的原因是
A. 湖底有线状洼地，冬季河道封冻，夏季来水量大
B. 湖底平坦，入湖水量夏季大于冬季
C. 湖底有线状洼地，水位季节差异明显
D. 湖底平坦，长江顶托作用季节变化明显
[单选题]Which of the following is TRUE according to Paragraph 3?（ ）
A. Americans do not understand broken English.
B. The author’s mother was not respected sometimes.
C. The author’ mother had positive influence on her.
D. Broken English always reflects imperfect thoughts.
[单选题]24________
A. broke in .
B. settled down
C. turned up
D. showed off
[单选题]苹果等梨果的食用部分主要来自( )。
A. 子房壁(ovary wall)
B. 花筒(托杯)
C. 珠被
D. 花序轴
[单选题]If you have a job，_____ yourself to it and finally you’ll succeed．
A. do devote
B. don't devote
C. devoting
D. not devoting
[单选题]EAll too often , a choice that seems sustainable（可持续的）turns out on closer examination to be problematic. Probably the best example is the rush to produce ethanol（乙醇）for fuel from corn . Corn is a renewable resource —you can harvest it and grow more, almost limitlessly . So replacing gas with corn ethanol seems like a great idea .
A. One might get a bit more energy out of the ethanol than that used to make it, which could still make ethanol more sustainable than gas generally, but that’s not the end of the problem. Using corn to make ethanol means less corn is left to feed animals and people, which drives up the cost of food. That result leads to turning the fallow land — including, in some cases, rain forest in places such as Brazil — into farmland, which in turn gives off lots of carbon dioxide（CO2）into the air. Finally, over many years, the energy benefit from burning ethanol would make up for the forest loss. But by then, climate change would have progressed so far that it might not help.
B. You cannot really declare any practice “sustainable” until you have done a complete lift-cycle analysis of its environmental（环境的）costs. Even then, technology and public policy keep developing, and that development can lead to unforeseen and undesired results. The admirable goal of living sustainable requires plenty of thought on an ongoing basis.
C. 57. What might directly cause the loss of the forest according to the text?
D. The growing demand for energy to make ethanol.
E. The increasing carbon dioxide in the air.
F. The greater need for farmland.
G. The big change in weather.
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