读“我国某地区的等高线地形图”，回答。
乙处的海拔高度是（）。（填范围）
参考答案：600-800
一家营业商店上午8点开门，到晚上10点30分结束营业，问：这家商店全天营业多少时间？
Which of the following statements is NOT true of nuclear plants in Britain
A．They have caused a series of power failures recently.
B．They have betrayed trust of the general public.
C．They need improvement in management.
D．They demand promotion of security awareness.
