题目内容
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What main idea does the second paragraph give about plastics？
A．They originated primarily as road-surfacing materials.
B．They have come into general use for a long time.
C．Their popularity was at its height at the time of the Industrial Revolution.
D．The earliest types were soft and quickly became stiff.
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更多“What main idea does the second…”相关的问题
What is the main idea of the article Cigars : Health Effects and Trends"？
A．When it comes to cancer, cigars are not any safer than cigarettes.
B．Cigars may be addictive while cigarettes are not easily so.
C．Cigars contain less harmful substances than cigarettes.
D．Increase in cigar-smoking does not affect public health much.
What is the main idea about this news item？
A．The carbon tax does not exist in Europe.
B．French government backs down on carbon tax plan.
C．The court rejected the carbon tax plan last year.
D．The president is revising the carbon tax plan.
What is the main idea of the article "Cigars: Health Effects and Trends"？
A. When it comes to cancer, cigars are not any safer than cigarettes.
B. Cigars may be addictive while cigarettes are not easily so.
C. Cigars contain less harmful substances than cigarettes.
D. Increase in cigar-smoking does not affect public health much.
What is the main idea of the article "Cigars: Health Effects and Trends"？
A．When it comes to cancer, cigars are not any safer than cigarettes.
B．Cigars may be addictive while cigarettes are not easily so.
C．Cigars contain less harmful substances than cigarettes.
D．Increase in cigar-smoking does not affect public health much.
The main idea in this passage is that ______.
A．most marketable pearls are cultured because nature does not produce enough of its own to satisfy the market
B．cultured pearls are of a higher quality than natural pearls
C．there are two major methods of pearl-making
D．a natural "drought" of pearl production is taking place
What is the main idea of the passage？
A．Venice is sinking.
B．Venice is a dream like city.
C．It is not easy to change the timetable of the public bus service.
D．There are many historic sites in Venice.
What is the main idea of the passage？
A．Water cycle.
B．Water vapor.
C．How rain forms？
D．Water, vapor, rain.
What is the main idea of this passage？
A．Advertising in America.
B．How to do advertising,
C．The importance of advertising.
D．Misleading of the advertising.
What is the main idea of the passage？
A．Geniuses are great people.
B．Geniuses are strange people.
C．Geniuses always lead a sad life.
D．To be too gifted is not good for peopl
