A．5A
B．5A
C．5/2A
D．/2A
答案：C
The word "preserved" in line 8 is closest in meaning to
A．( confused with others
B．( gradually weakened
C．( protected from destruction
D．( lost permanently
加州电力市场的辅助服务市场的模式为（）
A.统一型
B.投标型
C.双边合同型
D.投标型和双边合同型结合
A
/2
/2A