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【单选题】
肺循环的血液最后流入（）A.
左心房
B.
右心房
C.
左心室
D.
右心室
E.
上、下腔静脉
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反馈参考答案：
举一反三
【多选题】A watershed system is organized by the next definitions:
A.
watershed lines
B.
catchment basins
C.
minima
D.
threshold level
【简答题】试分析俄罗斯主要农业区为什么主要分布在伏尔加河流域和顿河流域？
【单选题】By saying 'It will represent a ' watershed moment' in the evolution of the internet as an advertising me-dium' , the trade magazine suggests______.
A.
Google and Yahoo! share advertising revenues with television networks
B.
the success of Google and Yahoo takes a turning-point to online advertising
C.
America's three big television networks play an important role in the development of advertising medium
D.
Google and Yahoo! build up their status in advertising
【简答题】流域面积（watershed area；catchment area）
【简答题】In the 1940 Richard Wright s______came out as a watershed in the tradition of the African American novel.
【简答题】七千多年前，中国 流域就开始种植水稻了。More than seven thousand years ago, China began to plant rice in the watershed.
【单选题】The ______ on a bank note is virtually invisible on a flat surface.
A.
watermelon
B.
watershed
C.
waterproof
D.
watermark
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