口算我最棒!100%-50%=80%+12%=95%-10%=1-25%=30%

搜题请搜索小程序“爱下问搜题”

问题解答题

口算我最棒! 100%-50%=	80%+12%=	95%-10%=
1-25%=	30%+24%=	50%-16%=

答案

100%-50%=0.5，	80%+12%=0.92，	95%-10%=0.85，
1-25%=0.75，	30%+24%=0.54，	50%-16%=0.34．

选择题

The poor old man with his two daughters ___ in the street.

A．was seen to beg

B．were seen to beg

C．was seen begged

D．were seen begging

单项选择题

评价单元的划分方法主要有：以( )为主的划分方法和以装置和物质特征为主的划分方法。

A．系统能量类别
B．职业伤害类别
C．危险有害因素类别
D．危险物质类别