图中④表示的是（ ）
A．山谷
B．鞍部
C．山顶
D．陡崖
读图可得，④表示陡崖，该处等高线重合．
故选：D．
根据图片提示完成下列句子。
1. —Where's your pen pal from?—He is from _______.
2. Does his aunt go to _______?
3. Where can you see the sightseeing in the picture?_______ in China.
4. If you visit _______, you can see Tian'an men Square.
5. Look at the flag, Which _______ is it? It is United States.
发展党员为什么要征求党内外有关群众的意见？
1. —Where's your pen pal from?—He is from _______. 
2. Does his aunt go to _______? 
3. Where can you see the sightseeing in the picture?_______ in China. 
4. If you visit _______, you can see Tian'an men Square. 
5. Look at the flag, Which _______ is it? It is United States.