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【简答题】
苯分子中含有( )个σ键, ( )个大π 键
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反馈参考答案：
举一反三
【单选题】下列表述正确的一句是()。
A.
报告是下行公文，主要用于对下级机关做报告。
B.
报告适用于向上级机关汇报工作，反映情况，答复上级机关的询问。
C.
报告这种公文的语言一定要形象生动。
D.
报告这种公文可以根据需要展开议论。
【简答题】完形填空。 Now in some places of our country, many people are cutting down (砍 伐) the trees in the forests. They need more 1 to build houses and more farmland to grow crops and so on. The areas of forest...
【多选题】海关总署发布的《关于跨境电子商务零售进出口商品有关监管事宜的公告》主要的适用范围是?
A.
跨境电子商务企业
B.
具有对外贸易经营权的企业
C.
通过跨境电子商务交易平台进行商品交易的消费者
【判断题】In China, more than half of its total land area covered by mountains, hills and high plateaus.
A.
正确
B.
错误
【单选题】Paragraph 4 tells us that when visiting a foreign country, ______.
A.
it is very uncommon for one to encounter embarrassing situations
B.
it is hard for one to adapt to the material aspects of life there
C.
people often expect to meet differences in customs
D.
people expect the same kind of food and weather
【简答题】China's topography is varied and complicated, with towering mountains, basins of different sizes, undulating plateaus and hills, and flat, fertile ___________ .
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