更多"Is nothing sacred Even the idle wee"的相关试题:
[单项选择]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 and the water’s drag.
The equations showed that the faster a spinning stone is travelling, the more times it will bounce. So no surprise there. To boun
A. find a big, round stone
B. reduce the spin of the stone
C. make the stone spin as fast as possible
D. do some complicated mathematical equations
[填空题]Blogging is a pastime for many, even a livelihood for a few. For some, it becomes an (36) . Such bloggers often feel compelled to write several times daffy and feel (37) if they don’t keep up. As they spend more time leaning over their computers, they (38) family, friends and jobs. They blog at home, at work and on the road. They blog openly or sometimes quietly so as not to call attention to their habit. The number of bloggers has grown quickly, thanks to (39) like blogger.com, which makes it easy to set up a biog. Technorati, a blog-tracking service, has (40) some 2.5 million blogs. Of course, most of those millions are (41) or, at best, maintained infrequently. For many bloggers, the (42) soon wears off and their persistence (43) . Sometimes, too, the realization that no one is reading sets in. (44) . By Jupiter Research’s estimate, only 4 percent of online users read biogs. Indeed
