[判断题]宿舍内禁止吸烟、烧煮、烹饪或私自乱拉乱接电线，及擅自使用任何电加热器，特别是：电热棒、电水壶、电炉、取暖器等。(　　)
A.正确
B.错误

　　从垂直高度来看，世界人口分布的不平衡性十分明显。海拔200米以下的陆地面积占27.8%，而居住在这一高度内的人口比重却占到56.2%，200米～500米高度的陆地面积占全部陆地的 29.5%，而居住在这一高度内的人口为24%，500米～1 000米高度的陆地占总面积的19%，人口占11.6%。也就是说，世界人口90%以上是居住在海拔1 000米以下的比较低平的地区。尽管目前世界上最高的永久性居民已达海拔5 000米的高度(南美洲的安第斯山区和我国西藏)，最高城市也达到海拔3 976米(波利维亚的波托西)。

Passage Five
Few Americans remain in one position or one place for a lifetime. We move from town to city to suburb, from high school to college in a different state, from a job in one region to a better job else where, from the home where we raise our children to the home where we plan to live in retirement. With each move we are forever making new friends, who become part of our new life at that time.
For many of us summer is a special time for forming new friendships. Today millions of Americans vacation abroad, and they go not only to see new sights but also with the hope of meeting new people. No one really expects a vacation trip to produce a close friend, but the beginning of a friend ship is possible.
The word "friend" can be applied to a wide range of relationships--to someone one has known for a few weeks in a new place, to a fellow worker, to a childhood playmate, to a man or woman, to a trusted confidant(知己).