经国务院批准占用基本农田的，占用单位应当按照()的原则，负责开垦与所占基本农田的数量与质量相当的耕地；没有条件开垦或者开垦的耕地不符合要求的，应当按照省、自治区、直辖市的规定缴纳耕地开垦费，专款用于开垦新的耕地。
A. 多占地，少开垦
B. 占多少、垦多少
C. 少占地，多开垦
D. 占多少，用多少
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According to the article, what changes did the Commercial Revolution bring about？
A. Methods of production.
B. Appearance of craft guilds.
C. Increased trade volume.
D. Growth of trade, banking and methods of productioa
What is the policy adopted by many schools after heated debating？
A. It is for the universities to clamp down on speech concerning racist comments or other forms of inappropriate ideas.
B. It is to teach students to learn how to express themselves more clearly.
C. It is to give the minority groups/he right to speak freely.
D. It is to urge students to discuss problems concerning race, religion, national origin and ethnicity.
The passage implies that________.
A. LED bulbs are still expensive at present
B. the task of making LED the main source of artificial light is too difficult
C. LED traffic lights are used everywhere in the world
D. in order to fulfill the task of making LED the main light source, lightbulb makers have to work together with semiconductor manufacturers
The author implies that villagers liked LED bulbs very much, because they________.
A. were given by Irvine-Halliday
B. are rugged
C. are cheap
D. are easily-recharged
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