“三公九卿”的“三公”是指()。
A.太仆
B.太尉
C.左右丞相
D.御史大夫
参考答案:B, C, D
It_____we had stayed together for several weeks_____ I found we had a lot in common. [ ]
A. was until; when
B. wasn't until ; that
C. wasn't until; when
D. was until; that
什么是心肌核素显像?