31. The passage is mainly about______
A. using tires in their initial shape
B. how to reuse discarded tires
C. how to recycle activated, carbon
D. the recycling rate of tires in Japan
32. According to the passage, which of the following statements is NOT true? A. Rubber can be recycled to produce new products.
B. In 1993 most of used tires in Japan could be recycled.
C. 100 percent of used tires can be used for recycling in Japan
D.Activated carbon made from tires has good quality,
33. Rubber derived from used tires can be widely used because ______
A. it can be processed into new products
B. it can be recycled 100 percent
C. it contributes to improving the appearance of our cities
D. such rubber is especially strong
34. According to the Kobata method,______of activated carbon can be obtained
from used tires.
A. 1.5 kilograms
B. 7 kilograms
C. more than one fifth
D. 93 percent
35. The epoch making technology refers to______
A. turning out manufacturing-patent
B. burning used tires to make activated carbon
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