第三方物流企业的经营效益同货主企业的下列指标没有直接紧密联系的是()。
A．物流效益
B．物流服务水平
C．物流服务范围
D．物流效果
参考答案：C
三峡大坝蓄水至175米后，三峡水库的防洪库容将达到221.5亿立方米，相当于4个荆江分洪区的可蓄洪水量．用科学记数法表示221.5亿为（ ）
A．2.215×102
B．2.215×1010
C．221.5×108
D．2.215×108
After reading
of his biology homework on Monday night, Bernie read
of his remaining homework on Tuesday night. What fraction of his original homework would Bernie have to read on Wednesday night to complete his biology assignment
of his biology homework on Monday night, Bernie read 
of his remaining homework on Tuesday night. What fraction of his original homework would Bernie have to read on Wednesday night to complete his biology assignment