2019 Beijing Question 44 Single-choice Differentiating 2019_北京卷 (英语) 45. What is the main purpose of the passage? A. To assess the consequences of ocean colour changes.B. To analyse the composition of the ocean food chain.C. To explain the effects of climate change on oceans.D. To introduce a new method to study phytoplankton. Answer keyC ☆ SaveCan't do it, show the explanation查看原卷 →