读下面“不同地点昼长随季节变化统计曲线图”，完成下列问题。
判断下面三地纬度：A_____________、C_____________、D_____________。
0° 66°34′S 90°N
A地昼长不随季节而变，应是在赤道上；C点冬至日出现极昼，夏至日出现极夜，应在南极圈上；D点只有二分日昼夜平分，冬半年出现极夜，夏半年出现极昼，应位于北极点上。
Passage Two
| Americans usually consider themselves a friendly people. Their friendships, however, tend to be shorter and more casual than friendships among people from other cultures. It is not uncommon for Americans to have only one close friend during their lifetime, and consider other "friends" to be just social acquaintances. This attitude probably has something to do with American mobility and the fact that Americans do not like to be dependent on other people. They tend to "compartmentalize" (划分) friendships, having "friends at work", "friends on the softball team", "family friends", etc. Because the United States is a highly active society, full of movement and change, people always seem to be on the go. In this highly charged atmosphere, Americans can sometimes seem brusque (无礼的) or impatient. They want to get to know you as quickly as possible and then move on to something else. Sometimes, early on, they will ask you questions that you may feel are very personal. No insult is intended; the questions usually grow out of their genuine interest or curiosity, and their impatience to get to the heart of the matter. And the same goes for you. If you do not understand certain American behavior or you want to know more about them, do not hesitate to ask them questions about themselves. Americans are usually eager to explain all about their country or anything "American" in which you may be interested. So much so in fact that you may become tired of listening. It doesn’t matter, because Americans tend to be uncomfortable with silence during a conversation. They would rather talk about the weather or the latest sports scores, for example, than deal with silence. On the other hand, don’t expect Americans to be knowledgeable about international geography or world affairs, unless those subjects directly involve the United States. Because the United States is not surrounded by other nations, some Americans tend to ignore the rest of the world. |
It can be inferred from the passage that ______.
A．Americans’ character is affected by their social and geographical environment
B．Americans want to participate in all kinds of activities
C．curiosity is characteristic of Americans
D．Americans do not know how to deal with silence