救生专门技术是指在水上用最快的速度和合理方法将溺水者救出水域的一项专门技术。
参考答案：对
被告人孙某曾因故意伤害罪被判处6年有期徒刑，于2007年7月刑满释放。2011年5月5日中午，孙某给儿子孙某某(1995年5月5日生)过生日后，二人将同村的5岁男孩和某绑架并向和某的父亲索要30万元，因和某认识孙某父子，二人怕罪行败露，于当日将和某残忍杀害。本案中，孙某不够成( )。
A．教唆犯
B．主犯
C．累犯
D．帮助犯
In Township K, of the housing units are equipped with cable television. If of the housing units, including of those that are equipped with cable television, are equipped with videocassette recorders, what fraction of the housing units have neither cable television nor videocassette recorders ？（）
A.A
B.B
C.C
D.D
E.E
of the housing units are equipped with cable television. If 
of the housing units, including 
of those that are equipped with cable television, are equipped with videocassette recorders, what fraction of the housing units have neither cable television nor videocassette recorders ？（）