问题
选择题
28. The firm invested approximately 60 million dollars in________it says is the world’s largest bottle-bottle recycling plant.
A．that
B．where
C．what
D．How
答案
答案：C
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28. The firm invested approximately 60 million dollars in________it says is the world’s largest bottle-bottle recycling plant.
A．that
B．where
C．what
D．How
答案：C
Fe3+ + 4H2O
AlO2－ + H2↑