There was a football game on TV last Saturday evening. The game was between a Spanish team and an Austrian team. I sat in front of the TV at 7 o’clock, when the game began. An hour later, my wife came to join me. She seemed to be rather absent-minded while she was watching the game. Just as the clock showed one minute and forty two seconds left in the game, she began cheering wildly, "Come on—get going!" Since she had never been a football fan, I looked at her in surprise and asked which team she was cheering for. "Neither," she replied, "I ’m cheering the time clock on.
When was the football game shown on TV( ).
W: Did you go to the football match last Saturday
M: Oh yes. It was supposed to start at 2:30, but it was delayed 15 minutes.
When you watch a football game on a
Saturday afternoon, you feel secure in your knowledge of what will happen when a
player boots the ball. It first goes up and then it comes down. That’s how
it is, was, and will be--unless.... if the kicker someday should kick the ball
such that at the instant it left his toe it were travelling upward at a rate of
11.2 kilometers per second (25 000 mhr). We would find that we would not have to
worry about a punt return, because the ball simply would not come down. This
particular speed is the escape velocity of an object from the earth. At this
speed, any object, large or small, will escape from the earth to soar forever
upward until captured by the gravitational attraction of some other planet or
heavenly body. At first thought it might seem that a heavy object might require
a greater initial spe A. demands a greater initial speed than a lighter one B. demands as great an initial speed as a lighter one C. must be made lighter than its original weight D. has to overcome a greater gravity than a lighter one 我来回答: 提交
|