In Chicago, a computerized system has been developed that controls(管理)traffic on the city’s 235 miles of seven expressways. Now one—a controller—can follow the movement of Chicago’s traffic by looking at a set of lights. The system uses electric sensors(感應器) that are built into each expressway, every half a mile. Several times a second, the computer receives information from each sensor and translates it into green, yellow or red lights on a map in the control room. A green light means traffic is moving forty-five miles an hour, yellow means thirty to forty-five miles an hour, and red means heavy traffic—cars standing still or moving less than thirty miles an hour.
“See that red light near Austin Avenue?”the controller asked a visitor.“That’s a repair truck fixing the road, and the traffic has to go around it.”At the Roosevelt Road entrance to the expressway, the light kept changing from green to red and back to green again.“A lot of trucks get on the expressway there,”the controller explained.“They can’t speed up as fast as cars.”The sensors show immediately where an accident or a stopped car is blocking the traffic, and a truck is sent by radio to clear the road. The system has lowered the number of accidents by 18 percent. There are now 1.4 deaths on Chicago’s expressway for each one hundred million miles traveled, while in other parts of the county there are 2.6.
Traffic experts say that the Chicago system is the “coming thing”.Systems like Chicago’s are already in use on some expressways in Los Angeles and Houston.“Chicago has taken the lead,”said New York City’s traffic director and he added,“Chicago’s a good example.”
根據(jù)短文內(nèi)容,選擇最佳答案,并在答題卡上按要求作答。
1.The passage is mainly about ________ on expressways in Chicago.
A. the traffic control system B. the movement of the traffic
C. the electric sensors D. the traffic lights
2.When the cars move under 30 miles an hour, ________ on the map in the control room.
A. the red light appears B. the red light turns yellow
C. the yellow light appears D. the green light turns red
3. According to the passage, we may learn __________.
A. some visitors are traveling on the expressway
B. there is no heavy traffic on Chicago’s expressways
C. the traffic on Chicago’s expressways is well managed
D. the number of accidents in the US has dropped by 18%
4.In Paragraph 2 the underlined word “it” refers to ___________.
A. the red light B. the truck that needs repairing
C. the traffic D. the truck that is fixing the road
5.The writer writes the article mainly by _________.
A. giving reasons and results B. giving examples and explaining them
C. describing what he thinks D. asking and answering questions
1.A
2.A
3.C
4.D
5.B
【解析】【主旨大意】本文介紹了美國芝加哥用電腦系統(tǒng)如何管理城市的高速公路。
|
考查點 |
解題思路 |
1. |
大意理解題 |
根據(jù)文章大意可知這篇文章主要介紹了在芝加哥高速公路上的交通控制系統(tǒng),因此選A。 |
6. |
細節(jié)理解題 |
根據(jù)文章第一段最后一句可知答案為A the red light appears. 。 |
7. |
大意理解題 |
根據(jù)第二段和第三段的大意可知在芝加哥高速公路的交通被很好的管理。因此選C。 |
8. |
理解判斷題 |
根據(jù)上文可知此處it代替“the truck that is fixing the road”。 |
9. |
寫法判斷題 |
通讀全文可知作者是通過舉例子講事實來寫這篇文章的。 |
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A.You just need wait for some time, then luck will come. |
B.Luck will come if you try your best to do everything. |
C.It’s important for you to wait for luck. |
D.You should trust your mother. |
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Dear Mike,
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