阶段分类
1-5 入门基础，6-35 巩固练习，36 之后的用于测试和模考
学科分类
集中弥补容易丢分的话题和学科短板
1
Groundwater
考友平均正确率：57.98%
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The Origins of Theate
考友平均正确率：57.94%
Timberline Vegetation on Mountains
考友平均正确率：67.91%
2
Desert Formation
考友平均正确率：77.28%
The Origins of Cetaceans
考友平均正确率：65.83%
Early Cinema
考友平均正确率：68.80%
3
Architecture
考友平均正确率：72.19%
Depletion of the Ogallala Aquifer
考友平均正确率：74.08%
The Long-Term Stability of Ecosystems
考友平均正确率：74.99%
4
Deer Populations of the Puget Sound
考友平均正确率：68.94%
Cave Art in Europe
考友平均正确率：68.54%
Petroleum Resources
考友平均正确率：68.69%
5
Minerals and Plants
考友平均正确率：72.24%
The Origin of the Pacific Island People
考友平均正确率：70.25%
The Cambrian Explosion
考友平均正确率：79.60%
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