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【单选题】
抗支原体(霉形体)有效药物是( )A.
菌素
B.
杆菌肽
C.
苄青霉素
D.
灰黄霉素
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举一反三
【单选题】If one moves across states in America, he or she is required to re-register in the new residence and change the license plate within the stipulated time. This shows _________ of American Federalism.
A.
democracy
B.
mandate
C.
low efficiency
D.
prevarication
【简答题】When you look at the sky at night, the moon looks bigger than the stars. Actually, the moon is much smaller than the stars and the sun. It’s much smaller than the earth. But the moon is much closer to...
【简答题】阅读右图所示的程序框图，若运行该程序后输出的y值为 1 8 ，则输入的实数x值为______．
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