题目

Australia's Great Barrier Reef (大堡礁) is the world's largest reef system. It is over 2,600 kilometers long. You can even see it all the way from outer space. The reef is home to many animals: fish, birds, turtles, sharks and even whales. 【1】Climate(气候) change, overfishing, tropical storms and water pollution make the reef in great danger. Coral reef experts at Australian universities say that if we do nothing to stop it, the coral reef could be destroyed before 2030.【2】 Everyday things like driving cars, using electricity (电) and running a factory create greenhouse gases (下列关于基因的说法，错误的是A．基因在染色体上呈线性排列B．基因的脱氧核苷酸的排列顺序就代表遗传信息C．基因是控制生物性状的遗传物质的功能单位和结构单位D．基因是染色体上的一段