哪些方法可用于心功能的测定()。
A.99mTc-MIBI门控心肌血流灌注显像
B.核听诊器
C.门控心血池造影
D.首次通过法显像
E.心肌梗死显像
参考答案:A, B, C, D
My sister _____ as a secretary in her company for three years and now she _____ to
the manager of the sales department. [ ]
A. served; has been promoted
B. had served; has been promoted
C. has served; has promoted
D. was serving; has promoted
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