He told us that where _____ a picnic was not decided yet. [ ]

A. having

B. to have

C. have

D. had

血液分析仪的检测原理不包括（）。

A.电阻抗法

B.光散射法

C.容量、电导、光散射法

D.电阻抗与射频法

E.单一角度偏振光散射法