About ________ of the students in Grade Nine this year were born in the ________.

A．three five; 1996

B．three fifths; 1990s

C．third fifth; 1997

D．third fifths; 1990s

我国“十一五”时期能源建设总体安排所依据的原则是( )。

A．因地制宜、多元发展
B．发挥资源优势、依靠科技进步、积极稳妥推进
C．西电东送、水火调剂、强化支撑、保障安全
D．优化结构、区域协调、产销平衡、留有余地