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| 文章出处：学生大考试站 发布时间：2005-10-12 |
o use it. (Today the unit isdefined simply as the distance between two marks on a platinumiridium (2??e)bar kept in a suburb of Paris). The unit is the meter, and the system ofmeasurements based on this unit is the metric system, the system today usedby scientists the world over.
The metric system is built in units of ten, Greek prefixes showingmultiples and Latin prefixes showing fractions. The Greeks had no word for anumber larger than ten thousand and the Romans had none for a number largerthan one thousand, but the system was extended by using less specific words;for instance megameter (one million meters) is derived from a Greek word thatmeans simply"large".
86. The French constructed a new system of weights and measures because
_______.
A) their system did not conform to other nations' systems
B) they were in the midst of a revolution
C) simplifying the old system proved difficult
D) they wished to break with the past
87. The selection says that the traditional system of measurements in France
_______.
A) varied widely from place to place
B) was useless
C) was based on a complicated logic
D) both A and B
88. The new system was to be developed from _______.
A) a single basic unit
B) a worldwide standard of measurement
C) an old Greek system
D) the smallest unit of traditional system
89. At first the basic unit was to equal _______.
A) one-millionth part of the earth's circumference
B) the distance between two marks on a platinumiridium bar
C) one forty-millionth part of the earth's circumference
D) one forty-millionth part of the earth's diameter
90. When the basic unit was proved inexact, the French _______.
A) reconstructed the entire system
B) changed to another system
C) redefined the meter
D) returned to the traditional system of measurements
WRITING
Directions: For this part, you are allowed 30 minutes to write a composi-tion on Can Road Accident Be Avoided?#fs in three paragraphs. You are giventhe first sentence of each paragraph. Your part of the composition shouldbe no less than 100 words, not including the words given. Remember to writeclearly.
You should write this composition on the Composition Sheet.
Can Road Accidents Be Avoided?
There are more and more road accidents in our cit
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