【简答题】If the impact factor of a journal in 2017 is 1.5 and there are 2000 articles published on this journal from 2015 to 2016, these articles have been cited for totally (number)times in 2017.
【简答题】Sam has been a (1) for (2) years. He has done everything from (3) to (4) work.
He has also done (5) work and now he is (6). Sam thinks (7) is a very stressful job, but it depends on the assignment on...