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问题 单项选择题

冠状动脉粥样硬化，最常受累的动脉分支是

A．右冠状动脉主干

B．左冠状动脉主干

C．右冠状动脉回旋支

D．左冠状动脉回旋支

E．左冠状动脉前降支

答案

参考答案：E

单项选择题 1.0

控制物又称质控品，质控品分（）

A.冻干质控品、液体质控品和标准品

B.冻干质控品、液体质控品和混合血清

C.冻干质控品、液体质控品和次级参考物

D.标准品、次级参考物和混合血清

E.标准品、次级参考物和冻干质控品
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单项选择题

Although writing from different points of view and with different techniques, writers in the Victorian Period shared one thing in common, that is, they were all concerned about ______.

A. the fate of the upper class

B. the reformation of the government
C. the fate of the common people

D. the future of their family class
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