ETS给的说明是PP2第二套可以很好的模拟真实考试的成绩
Based on the results of Practice Test 1, you can then plan your test preparation accordingly. Once you feel you have sufficiently prepared, complete Practice Test 2 under timed conditions. At the end of the practice test, you will receive Verbal Reasoning and Quantitative Reasoning scores on the 130–170 score scales. When you return to the Practice Test Options page after completing the practice test, you will have the option of reviewing your answers to all the Verbal Reasoning and Quantitative Reasoning questions and the correct answers. To evaluate your Analytical Writing essays, you can review scored sample essays and compare them to your responses. On the Practice Test Options page, you can save your essay responses to a file and later compare them to the sample essay responses. Your results on Practice Test 2 will give you a good estimate of how well prepared you are for the actual test.