单项选择题

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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单项选择题
A．On a mountain trail.B．In a classroom.C．At a weather station.D．At a planetarium.
A．On a mountain trail.
B．In a classroom.
C．At a weather station.
D．At a planetarium.
单项选择题
A．An art student.B．A chemistry student.C．A newspaper reporter.D．A landscape designer.
A．An art student.
B．A chemistry student.
C．A newspaper reporter.
D．A landscape designer.
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