搜题
王老师:19139051760(拨打)
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第1题

A lot of natural resources in the mountain area will be exploited and used.
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第2题

Fred was such a hardworking student that he soon came out first in the class.
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第3题

求解方程dy/dx=-x/y的解是____
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第4题

The traffic jams during morning and afternoon rush hours are a headache in big cities now.
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