题目

改变外界条件可以影响化学反应速率，对反应H2(g)+I2(g) 2HI(g)，其中能使活化分子百分数增加的是（    ）①升高体系的温度  ②增加反应物浓度  ③增大气体的压强  ④使用催化剂 A．①③          B．①④           C．②③          D．③④ 答案：B1．Macao is only forty miles from Hong Kong and it is easy to reach．You can get there by sea．It is an interesting place and it has a long history．Macao is part of China and most people living there are Chinese．      The first Europeans in Macao came from Portugal．More than four hundred years ago the Portuguese went there to trade with China．Some settled and made their homes there．They built strong forts（要塞）to guard the city and the harbor．They also built churches，schools，hospitals and other places．Slowly the city grew．People from many other countries came to live and work in Macao．     Today many people live in Macao．Some only go there to watch dog-racing or motor-racing or to gamble（赌博）with their money．But Macao is a quiet and peaceful place．It is pleasant just to walk around and look at the old buildings and forts．You feel you are back in the old days．Of course，some of the buildings are now in ruins．The Church of St．Paul has only the front wall with many steps leading up to it．But it is still interesting to see．     When you are hot and tired，there are small cool gardens to rest in．When you are hungry，there are good restaurants with many kinds of food．Nearby are some islands，which are also nice to visit and are easy to get in．There are certainly a lot to see and to do in Macao．13．Macao is easy to get to because it isD．A．part of China and most people living there are Chinese     B．an interesting place     C．very fast and cheap by sea                        D．not far away from Hong Kong14．You feel in Macao you are back in the old days becauseC．A．some of the buildings are now in ruins    B．you can watch dog-racing or motor-racing      C．you can find the old buildings and forts     D．it is a silent and peaceful place   15．The writer's idea is thatD．A．people from many countries came to live and work in Macao     B．the Portuguese were willing to do business in China     C．people in Macao serve good food      D．Macao is a quiet and peaceful place with a lot to see and to do．