珠海园区既可以从事保税物流，又可以从事保税加工，还可以从事国际贸易，是海关综合保税监管的特殊区域。
参考答案：对
什么是教育活动游戏化？
As there is less and less coal and oil, scientists are exploring new ways of making use of （）energy, such as sunlight, wind and water for power and fuel.
A. primary
B. alternative
C. instant
D. unique
