简述DNA指纹图的特征。
参考答案：
孟德尔遗传；组织同一性；高度的个体特异性；突变率。
偿债备付率小于（）时，表示可用于还本付息的资金不足以偿付当期债务。
A.0
B.1
C.2
D.3
That university has produced a large number of social celebrities, including four Presidents and three Speakers.
A. sprouted B. spawned C. stashed D. spouted
