tailieunhanh - Cracking the toefl ibt part 8

Ngữ pháp gọn gang dễ hiểu, bài tập đơn giản dễ làm là đặc trưng của tài liệu này. Nếu các bạn muốn hoàn thiện các kỹ năng nghe, nói, đọc, viết thì đây là tài liệu đáng tin cậy để các bạn sử dụng và phát triển kỹ năng tiếng anh của mình. | PRTIII Strategies for Cracking Each Section of the TOEFL I Cracking the Reading Section The TOEFL Reading sectton consists of Many of the questions are multiple-choice and worth one point each but some questions are worth two or more points typically these questions appear at the end of the section. Some of the words and phrases in the reading passages are underlined in blue on the screen if you click on these phrases a definition is provided. The screen looks like this. Otto Hahn and Fritz Strassmann discovered the process of nuclear fission in 1938 although it took another year for scientists to truly understand the process. During this process a uranium isotope is split by firing neutrons at it. When the neutron strikes the isotope it ejects neutrons of its own which in turn strike other uranium atoms. This sets off a chain reaction with each split atom causing another atom to break up as well. When controlled this type of chain reaction can be harnessed to produce useful nuclear energy. But if the reaction is not controlled the result is far more devastating a nuclear explosion. Shortly after the discovery of the potential destructiveness of nuclear power President Franklin Roosevelt set up a committee to investigate the ÜasMIitÿ of a nuclear weapon. Although initial progress was slow the program was reorganized in 1942 under the moniker the Manhattan Engineer District or simply the Manhattan Project. The project was headed by Robert Oppenheimer and was authorized to call upon the full resources of the government and military to achieve its goal. In this case if you click on the words uranium isotope or moniker you will see a definition of the word in question. You ll also notice that some of the words appear in gray boxes. These words have a special type of question associated with them which we ll look at soon. 120 CRACKING THE .