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【单选题】
张先生,就诊时突感胸阀心悸,护士为其测脉时发现每隔两个正常搏动后出现过早搏动,此现象称为A.
丝脉
B.
二联律
C.
三联律
D.
间歇脉
E.
缓脉
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反馈参考答案：
举一反三
【简答题】( )通信距离通常为几十米到几千千米,是一种可跨越国家及地区甚至遍布全球的计算机网络。
【单选题】Col. Quirk Browne was lucky to be able to telephone the fire brigade______.
A.
because it was a Sunday
B.
because the wires were burnt soon after the call
C.
because he was trapped upstairs
D.
because the house was a long way from the town
【单选题】It can be concluded from the passage that the Philadelphia Museum of Art ______.
A.
only collects paintings by American artists
B.
has sold many paintings to foreign collectors
C.
has a larger collection of paintings than other museums
D.
only exhibits a portion of its collection of paintings
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