下图是利用地理信息技术制作的某城市中心城区月交通事故次数示意图。读图，回答1—2题。
1、该图的制作与应用借助于[ ]
A．遥感技术获取道路网信息，测定监测点分布
B．全球定位系统确定事故的位置，预测交通流量
C．地理信息系统查询事故频次，分析出警最优路径
D．数字地球技术，实现道路与监测点的互换
2、根据图中交通网络，可以推断该城区[ ]
A．甲地是城市中心商务区所在地
B．乙地适宜建大型地面停车场
C．对外联系主要通道在西北方向
D．商业网点密度东部大于西部
1、C
2、D
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| We know that trees are useful in our everyday life. They 1 us many things, such as wood, oxygen, rubber, medicines and many other things. They can 2 tell us a lot about our climate. The following are the reasons. If you 3 a tree, you can see that it has many rings (年轮). Most trees grow one new ring 4 year. Because of this reason, we know 5 a tree is. A tree over a hundred years old means that it has more than a hundred 6 . When the climate is dry or very cold, the trees do not grow very much and their rings are usually 7 . When it is wet and warm, the rings are much thicker. If the rings are suddenly very thin or suddenly very thick, this means that the 8 changed suddenly. If we look at the rings of this tree, we can 9 about the climate for a hundred years. We can see 10 our climate is changing today. | ||||
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