The underlined phrase "cyclists' failure to keep up with the desired speed of motor traffic" in the second paragraph means______.
A. cyclists' speed is beyond the limit
B. cyclists' speed is much lower than that of motorists' and they easily get hurt
C. cyclists often compete with motorists on the roads
D. motorists usually took down upon cyclists.
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When did he win the Nobel Peace Prize?
A. In 1968.
B. In 1918.
C. In 1964.
D. In 1946.
The measures taken by government in some states in the second paragraph are for the purpose of
A. protecting people's convenience
B. protecting the cars and motors
C. protecting cyclists' safety
D. protecting the flowing of the traffic
From the first paragraph, the person riding a bicycle in the city should take______.
A. main roads
B. streets
C. highways
D. sidewalks
In a telephone survey of more than 2, 000 adults, 21% said they believed the sun revolved(旋转)around the earth. An【C1】______7% did not know which revolved around【C2】______. I have no doubt that【C3】______all of these people were【C4】______in school that the earth revolves around the sun.【C5】______may even have written it【C6】______a test. But they never【C7】______their incorrect mental models of planetary(行星的)motion【C8】______their everyday observations didn't support【C9】______they know. Their teachers told them people see the sun "moving【C10】______the sky as morning turns to night, and the earth seems stationary(静止的)【C11】______that is happening. Students can learn the right answers【C12】______heart in class, and yet never combined them【C13】______their working models of the world. The objectively correct answer the professor accepts and the【C14】______personal understanding of the world can exist side by side, each【C15】______by the other.
Outside of class, the student continues to use the【C16】______model because it has always worked well【C17】______that circumstance. Unless professors address【C18】______errors in students' personal models of the world, students are not【C19】______to replace them with the【C20】______one.
【C1】
A. excessive
B. extra
C. additional
D. added