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【简答题】
An alkaline earth element is radioactive. It and its daughter elements decay by emitting three alpha particles in succession. In what group should the resulting element be found?
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反馈参考答案：
举一反三
【单选题】Early Modern English refers to the language spoken( )
A.
from 1066 to 1500
B.
from 1150 to 1500
C.
from 1500 to 1700
D.
from 1600 to 1800
【单选题】Early Modern English began with the .
A.
Renascence
B.
Glory Revolution
C.
Norman Conquest
D.
Industrial Revolution.
【简答题】在配制培养基时,常用的凝固剂为____或____。
【简答题】培养基配制常用的凝固剂是[填空(1)]。
参考解析：
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