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• 3. 已知：(1) Cr2O3(s) + 2 Al(s) → 2 Cr(s) + Al2O3(s)，ΔH= -m kJ                (2) Fe2O3(s) + 2 Al(s) →
• 3. Because it is the last class for Miss Davidson, the sub teacher well-loved by all of the boys, __
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• 14. Regarding the coincidence, the judge expects an unequivocal explanation, without which you＇ll ne
• 17. In the science class today, the visiting professor introduced to us an assortment of insects whi
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• 15. Investigating closely into a number of contemporary literary theories reveals that some of them
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• 20. The great migration of European intellectuals to the United States in the second quarter of the
• 19. I just don＇t see how it possible for the kids to keep in good shape, for sugar is ubiquitous in
• 21. Dengue is ___ to humans by the Aedes aegypti (rarely Aedes albopictus) mosquito, which feeds dur
• 23. ___ language ability, researchers have discovered evidence that apes also possess self-awareness
• 24. As the policy stands now, lesbians and gays will be barred from US military service if they are