| Is nothing sacred Even the idle
weekend pastime of skimming stones on a lake has been taken apart and reduced to
a mathematical formula. Everyone knows a stone bounces best on water if it’s round and flat, and spun towards the water as fast as possible. Some enthusiasts even travel to international stone-skimming competitions, like world champion Jerdone Coleman-McGhee, who made a stone bounce 38 times on Blanco River, Texas, in 1992. Intuitively,a flat stone works best because a relatively large part of its surface strikes the water, so there’s more bounce. Inspired by his eight-year-old son, physicist Lyderic Bocquet of Lyon University in France wanted to find out more. So he tinkered with some simple equations describing a stone bouncing on water in terms of its radius(半径) ,speed and spin, and taking account of gravity A. International stone-skimming competitions. B. How to make stone-skimming more enjoyable. C. Stone-skimming is a sacred thing. D. The mathematical formula for stone-skimming. [单项选择]Passage One
Children learn almost nothing from television，and the more they watch the less they remember．They regard television purely as entertainment，resent programs that demand on them and are surprised that anybody should take the medium seriously．Far from being over—excited by programs，they are mildly bored with the whole thing． These are the main conclusions from a new study of children and television．The author Cardiac Cullingford confirms that the modem child is a dedicated viewer．The studv suggests that there is liRle point in the later hours．More than a third of the children regularly watch their favorite programs after 9 p．m．All 11-year—olds have watched programs after midnight． Apart from the obvious waste of time involved，it seems that all this viewing has liRle effect．Children don’t pay close attention，says Cullingford，and they can recall few detaiL7．They can remember exactly which programs they have seen but they can rarely explain the elem A. it is useless for television companies to delay adult viewing to the later hours B. it is a waste of time for children to watch adult programs on TV C. children should not watch television programs late into the night D. children are supposed to learn a lot from television programs [单项选择]Passage ThreeA. Diet has nothing to do with health.
B. The amount of food has something to do with health. C. Health depends on diet totally. D. Good food has nothing to do with health. [单项选择]Passage TwoA. They have nothing to do with each other. B. They have something to do with each other
C. They help each other in a way. D. They depend on each other. [单项选择]{{B}}Passage B{{/B}}
A. To study its geography. B. To help at an archaeological dig. C. To take a vacation with friends. D. To do research for a physics project. [单项选择]{{B}}Passage Three{{/B}}
A. dyslexia and intelligence B. dyslexia and culture C. dyslexia and vision D. dyslexia and personality 我来回答: 提交
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