单项选择题

A．Graduate students.
B．Undergraduate students.
C．Professors.
D．Library employees.
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单项选择题
A．A short period of fair weather and mild days.B．No definite time of beginning or ending.C．Its end, which signals winter’s start.D．Soft yellow or orange skies.
A．A short period of fair weather and mild days.
B．No definite time of beginning or ending.
C．Its end, which signals winter’s start.
D．Soft yellow or orange skies.
单项选择题
A．Agricultural products.B．Manufactured foods.C．Settlers.D．Farm animals.
A．Agricultural products.
B．Manufactured foods.
C．Settlers.
D．Farm animals.
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