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【单选题】
关于左冠状动脉的描述，下列哪正确的A.
起于主动脉弓
B.
分为前室间支和旋支
C.
分为前室间支和后室间支
D.
分支分布于室间隔的后1／3
E.
旋支分布于右心室侧壁
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举一反三
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【单选题】British universities, groaning under the burden of a huge increase in student numbers, are warning that the tradition of a free education is at risk. The universities have threatened to impost an admi...
A.
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B.
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C.
how to improve their educational technology
D.
how to put an end to the current tendency of quality deterioration
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A.
groaning
B.
grumbling
C.
lamenting
D.
moaning
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