What makes you _____ I'm a teacher? [ ]
A. to think
B. thinks
C. think
D. thinking
答案:C
某复合地基,桩截面积为Ap,以边长为L的等边三角形布置,则置换率为:
A.Ap/L2
B.1.15Ap/L2
C.1.5Ap/L2
触电的主要原因是什么?