题目

Bethany Meilani Hamilton was born on February 8, 1990 Kauai, Hawaii, where she grew up with two older brothers.  Hamilton's parents were both surfers and they started teaching Bethany how to surf at a young age, and she learned quickly with the support of her brothers. By age 8, Bethany was winning first place in surfing contests for her age group. Hamilton began competing more seriously at the age of nine, winning several more competitions in her age group. On October 31, 2003, while surfing with friends near Tunnels Beach, a 14-foot tiger shark attacked her. Bethany said, My arm was反应4NH3(g)＋5O2(g) 4NO(g)＋6H2O(g)在10 L密闭容器中进行，半分钟后，水蒸气的物质的量增加了0.45 mol，则此反应的平均速率v(X)(反应物的消耗速率或产物的生成速率)可表示为( )A． v(NO)＝0.001 0 mol·L－1·s－1 B．v(O2)＝0.001 0 mol·L－1·s－1C．v(NH3)＝0.010 mol·L－1·s－1 D．v(H2O)＝0.045 mol·L－1·s－1