题目

Modern inventions have speeded up people’s loves amazingly. Motor-cars cover a hundred miles in little more than an hour, aircraft cross the world inside a day, while computers operate at lightning speed. Indeed, this love of speed seems never-ending. Every year motor-cars are produced which go even faster and each new computer boasts (吹嘘) of saving precious seconds in handling tasks. All this saves time, but at a price. When we lose or gain half a day in speeding across the world in an airplane, our bodies tell us so.  We get the uncomfortable feeling known as jet-lag; our bodies feel 请用恰当的化学用语表示（1）保持氧化汞化学性质的最小微粒______________（2）空气中体积分数最大的气体________________（3）2个硝酸根离子 （4）五氧化二磷中磷元素的化合价______________（5）乙醇______________