流式细胞术检测________、________为诊断阵发性睡眠性血红蛋白尿提供直接的证据。
参考答案：CD55 CD59
—_______ didn't she come to school yesterday?
—Because she was ill. [ ]
A. When
B. Why
C. Where
D. How
人参的人参三醇：（）
A.Re
B.Rf
C.Rh
D.Rb
E.Rgl
