题目

A warm smile on the street, a happy “hello” in a public park or the cheery sound of your name at the neighborhood bar — it doesn’t take much to feel at home in a busy city. And in the following cities, these gestures are second nature, with locals who are quick to welcome visitors and neighbors alike. Dublin, Ireland Dublin is home to some of the warmest people on the planet. One of Europe’s smaller capital cities, Dublin also benefits from a low crime rate and a widespread feeling of security(安全), so residents are more likely to lend a stranger a helping hand. Locals spea 设C＋CO22CO－Q1(吸热反应)反应速率为v1，N2＋3H22NH3＋Q2(放热反应)反应速率为v2，对于上述反应，当温度升高时，v1和u 2的变化情况为 [　　] A． 同时增大 B． 同时减小 C． 增大，减小 D． 减小，增大