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Because (of the need) to maintain the correct balance of salts (and) minerals in the water, (keeping) saltwater fish in aquarium
Because (of the need) to maintain the correct balance of salts (and) minerals in the water, (keeping) saltwater fish in aquarium
admin
2004-12-29
126
问题
Because (of the need) to maintain the correct balance of salts (and) minerals in the water, (keeping) saltwater fish in aquariums requires more work (that) keeping freshwater fish.
选项
A、of the need
B、and
C、keeping
D、that
答案
D
解析
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