单选题：A country shows its progress with GNP by

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题目内容：
A country shows its progress with GNP by A．spending more money.
B．spending less money.
C．selling more products.
D．providing more jobs.

参考答案：
答案解析：

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Among the elements of noble gases Helium is the___.

Among the elements of noble gases Helium is the___. A．lightest B．reactive C．impo

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