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【单选题】
下列关于催化剂的说法中，正确的是A.
加入催化剂化学反应速度一定加快
B.
使用催化剂可改变物质的化学反应速率
C.
使用催化剂可以增加生成物的产量
D.
不使用催化剂物质就不能发生化学反应
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举一反三
【简答题】One day, a farmer was walking along a road with his son Thomas. The father said, “Look! There’s a horseshoe. Pick it up and put it in your bag.” Thomas said, “It isn’t worth the trouble.” His father s...
【简答题】One day, a farmer was walking along a road with his son Thomas. The father said, “Look! There's a horseshoe. Pick it up and put it in your bag.” Thomas said, “It isn't worth（值得） the trouble.” His fath...
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A.
美丽中国
B.
生态中国
C.
绿色中国
D.
红色中国
【简答题】面对()的严峻形势，必须树立尊重自然、顺应自然、保护自然的生态文明理念，保护自然生态系统，维护人与自然之间形成的生命共同体。 A资源约束趋紧 B环境污染严重 C生态系统退化 D开发利用 E勘探量增加
【简答题】One day, a farmer was walking along a road with his son Thomas. The father said, 'Look! There's a horseshoe .Pick it up and put it in your bag.” Thomas said, 'It isn't worth the trouble.' His father s...
【简答题】One day, a farmer was walking along a road with his son Thomas. The father said, “Look! There’s a horseshoe, pick it up and put it in your bag.” Thomas said, “It isn’t worth the trouble.” His father s...
【多选题】全面把握生态文明建设的总体要求是
A.
树立尊重自然、顺应自然、保护自然的生态文明理念
B.
坚持节约资源和保护环境的基本国策
C.
坚持节约优先、保护优先、自然恢复为主的方针
D.
着力推进绿色发展、循环发展、低碳发展
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