读“比例尺为十万分之一的地形图”，回答下列问题。
字母C表示的地形是（）。
参考答案：鞍部
— Could you please tell us about some good ways to learn English?
— My suggestion is that reading often and writing regularly ________.[ ]
A. are needed
B. is needed
C. be needed
D. should need
故障机理与故障模式的关系。
