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【单选题】
80C51单片机的4个并口中 ( )口在作为输出口使用外接上拉电阻。A.
P3
B.
P2
C.
P1
D.
P0
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【多选题】You may find( )in an apartment.
A.
a living room
B.
a dining room, a kitchen, a bathroom, a bedroom
C.
a balcony, a yard or a garage
D.
a car
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