核算整体业务会计年度度制效益时使用的是满期赔付率指标。
参考答案：错
300mLAl2(SO4)3溶液中，含Al3+1.62g,在该溶液中加入0.1mol/L的Ba(OH)2溶液300mL,反应后溶液中SO42-的物质的量浓度为（ ）
A．0.4mol/L
B．0.3mol/L
C．0.2mol/L
D．0.1mol/L
开放作文。
请根据下面提示，写一篇短文。词数不少于50。
In your spoken English class, your teacher shows you the following picture. You are asked to describe
the picture and explain how you understand it.
___________________________________________________________________________________
______________________________________________________________________________________
