题目内容

可持续发展可实现经济效益、社会效益和生态环境效益三个效益的统一。()

A. 正确
B. 错误

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The box is full and heavy.

A. True.
B. False.

The man can carry the box.

A. True.
B. False.

Sandwich was ______.

A. an Englishman
B. an American
C. a Frenchman

--Are they good friends?--______.

A. They are
B. Yes, they are
C. They're

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