As is known to all, there are many forms of energy, ______is solar energy.
A. one of that
B. one of whom
C. which of one
D. one of which
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一个善于吸收辐射能的物体，亦必是一个善于发射的物体。()
相对而言，潮湿空气有利于空气中细小颗粒物的积聚，从而可降低舍内粉尘浓度减少呼吸道疾病。()
What happens to LearningWare, Corporate Adrenalin, and Games2Train？
A. They are optimistic but cautious about e-learning.
B. They are successful even in the economic recession.
C. They will become profitable when the economy revives.
D. They will be provided with low-budget training programs.
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