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【简答题】
A．Her twin sister often brings friends home and this annoys the speaker. B．They can't agree on the color of the room. C．They can't agree on the kind of furniture. D．The speaker likes to keep things neat while her twin sister doesn't.
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举一反三
【单选题】有关右心房的说法,错误的是( )
A.
上、下半身的静脉血经上、下腔静脉口流入右心房
B.
由肺静脉将动脉血流入右心房
C.
心静脉血经冠状窦口流入右心房
D.
右心房侧的房间隔下部有卵圆窝