Research has become both simpler and more complex. It's simpler because,____ you have computer, you can find information you need by searching the Internet. For all you information, you don't have to go to ____library to find the relevant resource and take notes on it. Instead, you can find some sources from the Internet____print the copies needed. Remember, however, that you should usually consult different types of sources. That is, you ____always rely just on the Internet for you research.

    While finding information is easier than ever, at the same time, researching has become ____ complex. There is a lot more material available, which means you may be overwhelmed ____the amount of information. You need to learn ____ to sort through and find the relevant information for your particular project. Also,____ need to check the accuracy of it.

许多地方被称为革命圣地，是因为它们跟重大的革命历史事件有关。下列历史关系对应不正确的是（    ）

我国多种多样的地形中占比例最重的是（     ）