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问题 问答题

我国古代发明的“计里鼓车”，是利用车轮的转动情况来测路程的，请根据你掌握测量的有关知识，猜测“计里鼓车”是如何测路程的？如果车轮半径是0.6m，车轮转动多少圈，车前进1km？

答案

（1）利用车轮转的圈数，然后用圈数乘以轮的周长，可得车走的路程、

（2）车前进1km车轮转动的圈数n=

1000
2×3.14×0.6
=265

答：（1）根据L=2πr求出车轮的周长，再数出车轮转动的圈数n，用周长乘以圈数就可求出路程．

（2）车轮转动了265圈．

选择题

北回归线自东向西穿过的我国省级行政单位依次是[ ]

A、台、闽、赣、桂

B、台、粤、桂、云

C、台、琼、云、藏

D、云、桂 、粤、台

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单项选择题

Euthanasia has been a topic of controversy in Europe since at least 1936. On an average of six times a day, a doctor in Holland practices "active" euthanasia: (1) administering a lethal drug to a (2) ill patient who has asked to be relieved (3) suffering. Twenty times a day, life prolonging treatment is withheld or withdrawn (4) there is no hope that it can (5) an ultimate cure. "Active" euthanasia remains a crime on the Dutch statute books, punishable (6) 12 years in prison. But a series of court cases over the past 15 years has made it clear that a competent physician who (7) it out will not be prosecuted.

Euthanasia, often called "mercy killing", is a crime everywhere in Western Europe. (8) more and more doctors and nurses in Britain, Germany, Holland and elsewhere readily (9) to practicing it, most often in the "passive" form of withholding or withdrawing (10) The long simmering euthanasia issue has lately (11) into a sometimes fierce public debate, (12) both sides claiming the mantle of ultimate righteousness. Those (13) to the practice see themselves (14) sacred principles of respect for life, (15) those in favor raise the banner of humane treatment. After years (16) the defensive, the advocates now seem to be (17) ground. Recent polls in Britain show that 72 percent of British (18) favor euthanasia in some circumstances. An astonishing 76 percent of (19) to a poll taken late last year in France said they would like the law changed to (20) mercy killings. Obviously, pressure groups favoring euthanasia and "assisted suicide" have grown steadily in Europe over the years.

10（）

A.cure

B.treatment

C.operation

D.remedy
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