区域发展往往以资源的开发利用为基础,随着资源开发规模的不断扩大,人地关系也发生相应变化。据此完成下列问题。区域发展过程中,人地关系开始出现明显不协调的时期是
人地关系逐渐由紧张走向协调的区域发展阶段是
_____ three influenza type A virus subtypes(子类型) have been found in pigs.
_____, experts point out that students can easily fail at starting their business because of a lack of preparations.
It has always been the _____ of our goverment to encourage graduates to start their business.
The most important _____ of his speech at the G20 summit was that we should all unite to fight against the finanical.
He directed exposure to pigs,otherwise he_______pig flu.