【判断题】昆虫血液兼有哺乳动物血液和淋巴液的双重作用。
【简答题】Touring Guilin Guilin is primarily known for its charming and unique scenery. It has always been considered as (1) . Many Chinese poets and painters, both (2) included, have been' drawn to these pa rt...
【单选题】Guilin is the west of China.
【单选题】—Where's Guilin? —It's _____ the south of China. [ ]
【单选题】—Are you ready _______ your trip ______ Guilin? —Yes. [ ]
【简答题】商品标准化的基本原理包括 、 、 、 。