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【单选题】
心脏的大体解剖结构是（ ）A.
心腔分为右心房、左心房及右心室、左心室。心壁分为心外膜、心肌和心内膜
B.
心传导结构包括结、房室结、房室束、房室束左右脚及其末端形成的氏纤维
C.
全身静脉血经由右心房、右心室、肺动脉（含静脉血）流入肺，交换气体后，通过肺静脉（含动脉血）流入左心房、左心室，再通过主动脉流往全身各组织器官
D.
心脏的营养血管是冠状动脉、心大中小静脉
E.
以上都是
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举一反三
【单选题】This is ______.
A.
an introduction to some products
B.
an advertisement for selling goods
C.
a direction of a kind of washing machine
D.
a notice about a football game
【单选题】The passage is probably taken from______.
A.
an introduction of a novel
B.
a preface of a book
C.
an editorial
D.
a magazine
【单选题】This passage is probably taken from ______.
A.
a business letter
B.
an introduction
C.
an instruction
D.
an advertisement
【单选题】A well-planned agenda, posted ground rules, using a bin and ______ are the four most important keys to running the effective meetings.A. a minute B. a summary C. an introduction D. the meeting leader
A.
a minute
B.
a summary
C.
an introduction
D.
the meeting leader
【单选题】This passage is probably taken from ______.
A.
a text book
B.
an introduction to a book
C.
a scientific report
D.
an interview with two leading scientists in medicine
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