何谓林业“三害”？（）
A、森林火灾
B、病虫鼠害
C、乱砍滥伐
D、非法狩猎
参考答案：A, B, C
The outbreak of this incident has given us much for thought, forcing us to ______ seriously on the
past and the future.[ ]
A. shape
B. reflect
C. urge
D. distribute
若a的值为3时，下列程序段被执行后，c的值是（ ）。 int c = 1； if (a>0)if (a>3) c = 2；else c = 3； else c = 4；
A．0
B．1
C．2
D．3
