单项选择题

能值分析方法把生态系统与人类社会经济系统统一起来，有助于调整生态环境与经济发展的关系，为人类认识世界提供了一个重要的度量标准。（）
A. 对

B. 错

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单项选择题

When I entered the study, I found my father at the desk and _ something.
A、seat, read
B、seated, read
C、seated, reading
D、seating, reading

The man has complained his life to his friend, therapist, accountant, and minister successively.
正确
错误

答案：正确