皮皮学，免费搜题
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【单选题】
油浸变压器呼吸器的作用是（）。A.
吸收空气中的水分和杂质
B.
用以清除变压器油中的杂质和水分
C.
用以吸收和净化变压器匝间短路时产生的烟气
D.
用以清除变压器各种故障时产生的油烟
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皮皮学刷刷变学霸
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【简答题】传播学最早诞生于(),传播学的集大成者是()
【单选题】A bank run occurs when______.
A.
a bank is closed for one or more days
B.
too many depositors attempt to draw out their money at one time
C.
there is not enough money to pay all of its depositors at one time
D.
employees of a bank take their own funds out of the bank
【单选题】A bank run happens when ______.
A.
a bank is closed for one or more days
B.
too many depositors try to draw out their money at one time
C.
there is not enough money to pay all its depositors at one time
D.
tellers of a bank take their own money from the bank
【简答题】传播学的集大成者是美国的_________________。
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