题目内容

精车表面粗糙度Ra可以达到（）um。

A. 1.6-0.8
B. 12.5-6.3
C. 50-12.5
D. 0.02-1.25

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When the law is implemented, the awareness of environmental pollution can be enhanced

A. 对
B. 错

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Since the invention of plastic bags, our life has been facilitated to the largest extent.

A. 对
B. 错

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Which statements about the use of plastic bags are ture?

A. Initiating a law which strictly bans the use of it.
B. Supermarkets or shopping malls should provide the bags for free or with a minimum charge.
C. Reducing to produce plastic bags those made from non-degradable materials.
D. Encourag ordinary shoppers to reuse the bags by giving them discount.

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The world's first'Recycle Mall', located in _________.

America
B. Sweden
C. England
D. Japan

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精车表面粗糙度Ra可以达到（）um。

A. 1.6-0.8 B. 12.5-6.3 C. 50-12.5 D. 0.02-1.25

When the law is implemented, the awareness of environmental pollution can be enhanced

Since the invention of plastic bags, our life has been facilitated to the largest extent.

Which statements about the use of plastic bags are ture?

The world's first'Recycle Mall', located in _________.

A. 1.6-0.8
B. 12.5-6.3
C. 50-12.5
D. 0.02-1.25