霍桑实验表明，人是（）。
A.经济人
B.社会人
C.自我实现人
D.复杂人
参考答案：B
I ______ the poor rabbit,but I didn't have the right drugs with me at that moment.[ ]
A. saved
B. had saved
C. could save
D. could have saved
火沿树干燃烧到树冠，火在树的顶部燃烧，此种林火称（）。
A.地表火
B.地下火
C.树冠火
D.草原火
