决策阶段的资源投入大约占工程项目总的资源投入量的( )。
A．1%-2%
B．1%-2.2%
C．1%-2.5%
D．1%-3%
参考答案：D
. John's success has nothing to do with good luck. It is years of hard work __________has made him what he is today.
A．why
B．when
C．which
D．that
镇静药物中毒的洗胃液是（）
A．1：5000高锰酸钾
B．2%碳酸氢钠
C．0.3%H2O2
D．0.3%氧化镁
E．5%硫酸钠
