更多"How far can the poisonous resin be "的相关试题:
[单项选择]Experienced baseball fielders can tell how far a ball is going to travel just by listening to the crack of the bat. If they didn’t, they wouldn’t stand a chance of catching it, claims a physicist in New York.
"When a baseball is hit straight at an outfielder, he cannot quickly judge the angle of the scent and the distance the ball will travel," says Robert Adair, a physicist at Yale University. If he relied purely upon visual information, the fielder would have to wait for about one-and-a-half seconds before he could tell accurately if the pitcher hit the ball long or short. By this time the ball may have travelled too far for him to reach it in time.
To stand a fighting chance of catching it, according to Adair, fielders must listen to the sound the ball hitting the bat to judge how far it will travel. There is anecdotal evidence to support this, he says. A former centre fielder told Adair: "If I heard a crack I ran out, if I heard a clunk, I ran in."
To test his hypoth
A. Because it may take longer time for him to exert judgment.
B. Because the ball may change directions during flight.
C. Because the ball may be hit either long or short.
D. Because light travels faster than soun
[单项选择]How far do the swallows migrate
A. About 200 miles.
B. About 1, 000 miles.
C. About 7,000 miles.
D. About 5,000 miles.
[单项选择]How far do the insects spread northward
A. To Michigan.
B. To China.
C. To Maryland.
D. To Canada.
[填空题]How far was Belle from robot arm
[单项选择]How far is Damson City from Edmonton
A. About 200 km.
B. About 2,000 km.
C. About 350 km.
[单项选择]How far is the bank?()
A. About 100 meters.
B. About 300 meters.
C. About 200 meters.
D. About 400 meters.
[多项选择]How far should team building be taken into account when making long-term plans for a company (Why / Why not)
[简答题]no matter with whom we communicate or how far our imaginations fly, our bodies—and hence many material interdependencies with other people~always remain locally situated. Thus it seems morally hazardous to commune with far-flung tele-mates, if that means growing indifferent to physical neighbors. It is not encouraging to observe just such indifference in California’s Silicon Valley, one of the world’s most "highly wired" regions.