阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
     Some years ago ,I was at a subway  station in Los Angeles  waiting in line to buy a ticket. As Istood there I saw a young man asking people for money so that he could buy hisbreakfast. Most of the travelers simply ____ (ignore) the young man or gave ____(he) a dirty look, yet a well-dressedmiddle-aged man reacted differently. When ____ (approach) by the young man, the gentlemanlooked ____at him and quietlyasked, “How much will you need?” I couldn’t hear ____the young man said but watched as thegentleman pulled several ____(note)from his wallet and ____ (calm) placed them in the young man’s hands.
         I don’t know whether the young man actually used the money forhis breakfast or for ____purposes.What I do know is that I witnessed two different reactions to the samesituation. I saw people who ____(be) either afraid or annoyed. Andthen I saw the gentleman who was not afraid and treated the homeless young manas though he were a brother. I decided then and there that, even though we haveto be____(care) in this world, Iwould rather be like the gentleman.

复数的虚部为                                                                                                                  （   ）

小明乘火车没途看到湛蓝的天空、绵延的雪山、成群的牦牛。火车经过的铁路线是（   ）。

有一个风洞实验室，一架模型飞机固定在托盘测力计上如图所示．无风时，托盘测力计示数为15N；当迎面有风吹过时，托盘测力计的示数减小，可以判定飞机受到了一个新的力，我们把这个新的力称为____ 力，方向是____ ．

下面是某小组研究该力的大小与风速关系的实验数据：

风速/（m/s）	5	10	15	20	25	30	35
托盘测力计的示数/N	14．5	13．0	10．5	7．0	2．5	0	0

根据上面的实验数据可知：飞机受到的这个新的力大小随着风速的增大而____ ．由此推测，飞机短距离快速起飞时应该____ （顺风．逆风）起飞．

当风速达到30m/s以上，托盘测力计的示数是0，说明了什么？____ ．

读“清代我国死亡千人以上灾害分布图”，判断图例中1～4表示的自然灾害分别是（ ）