职称英语考试综合类辅导：多重并列句
找连词 and， but， so， for， not……but， not only……but also， rather than，some……others.
例如：
（1）Uniformed Rangers， the most visible representatives of the Service， not only offer park visitors a friendly wave， a helpful answer， or a thought-provoking history lesson， but also are skilled rescuers， firefighters and dedicated resource protection professionals.
（2）They created images not of oil spills， but of" micro spills" that could spread disease and destroy entire population.
（3）Social distance is not always rigidly fixed but is determined in part by the situation.