题目

Going Green For career（职业） changers thinking about growth and advancement potential, forget the blue-collar and white-collar categories: Green is the way to go. According to Bracken Hendricks, a senior fellow at the Center for Global Progress, careers that promote environmental responsibility will become main stream within a decade. “The growth in green careers will be like the Internet boom, which not only created new jobs, but also had an influence on the overall economy（经济）,” he says. The increasing environmental problems and need for eco-friendly products and s浙江舟山近年来甲状腺疾病患者明显增多，医学研究人员发现：两年对舟山市民的甲状腺疾病发病率碘营养状况进行研究，发现海岛居民甲状腺疾病的发病率为33%，且甲状腺癌的发病率也比较高． 他们认为沿海居民日常以海带、紫菜、海鱼等含碘丰富的海产品为主，说明沿海地区居民的碘含量是充足的．海藻中含有丰富的碘，“2NaI+Cl2═2NaCl+I2”是实验室从海藻中提取碘单质的反应方程式，它属于（ ）A．置换反应B．分解反应C．化合反应D．复分解反应