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Clive:

【参考答案】

[B]
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A．Whether or not snowflakes can be analyzed.B．How snowflakes are formed.C．What causes a snowstorm.D．Where the largest snowflakes can be found.
A．Whether or not snowflakes can be analyzed.
B．How snowflakes are formed.
C．What causes a snowstorm.
D．Where the largest snowflakes can be found.
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Barry:
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