[单项选择]Now that we have a computer, we can ____________ everything we need easily.


A. look on
B. look in
C. look up
D. look down

[单项选择]

We have escaped the battle field and now can, with modem guidance system on missies, touch virtually every square yard of the earth’ s surface. It no longer involves only the military profession, but engulfs also entire civilian populations. Nuclear weapons have made major war un thinkable. We are forced, however, to think about the unthinkable because a thermonuclear war could come by accident or miscalculation. We must accept the paradox of maintaining a capacity to fight such a war so that we will never have to do so.
War has also lost most of its utility in achieving the traditional goals of conflict. Control of territory carries with it the obligation to provide subject people certain administrative, health, education, and other social services; such obligations far outweigh the benefits of control. If the ruled population is ethically or racially different from the rulers, tensions and chronic unrest often exist which further reduce the benefits and increase t
A. possibility of material gain
B. promoting deserving young men to higher positions
C. potential for increasing the security of the nation
D. desire to capture productive farming lands

[单项选择]According to Turing, a computer can prove to have human-like intelligence in a special test if ______.

[单项选择]You （） all those calculations! We have a computer to do that sort of thing.
A. needn't have done
B. must not have done
C. should not have done
D. can not have done

[单项选择]You（）all those calculations! We have a computer to do that sort of thing.
A. needn't have done
B. must not have done
C. shouldn't have done
D. can not have done

[单项选择]Now we can fly to Tokyo. There was a time ______ we had to take a boat.
A. how
B. what
C. why
D. when