题型：问答题 简答题 阅读理解。The 2012 London Olympic Games are on the wa3'. You may have a nice trip in London with the help of the following information.By underground The underground is fast and convenient. There is a station every few blocks. Underground trains run from 5:30 a.m. to 12:00 midnight. You can get to any place e 1 .By busTravelling by bus is a good way to see the city-, especially from the top of a double-decker bus. There is always a bus stop nearby. There are special tickets for c 2 under the age of 12."By trainTake a train to visit places outside London, like Hampton Court and Windsor Castle. You can use a Travelcard on the underground, buses and most trains. To p 3 your journey, get a map from the railwaystations, take some time to think about the places you want to visit.By taxiLondon's black taxis are f 4 . Many visitors to London know they are good and comfortable. They Will cost you a few pounds, though. Take ataxi once, for the experience.By b__5_ The "river bus" leaves from Westminster Pier and stops at different placesbetween Westminster and Greenwich Pier. A good way to see the city from the River Thames.By carDon't drive your car in London! Car parks are very e 6 . You have to pay a special congestion charge (拥堵费) to drive your car into the city centre.By bikeThere aren't many good bicycle lanes in London. Cycling with a large guided group is better than r 7 alone.On footThe best way to visit the city! But look right and left before you cross a street. There are many beautiful sights waiting for you. 查看答案
题型：问答题 简答题 Shall Mary come to the concert with us？－Not she has finished her paper．A．sinceB．onceC．whenD．unless 查看答案
题型：问答题 简答题 中国核潜艇技木世界领先．在潜艇中常用过氧化钠吸收二氧化碳并产生氧气来维持艇内空气成分平衡，其反应的化学方程式为：2Na202+2CO2=2Na2CO3+O2↑．现有质量分数为78%的过氧化钠100g．与足量的二氧化碳反应，可生成氧气多少克？（杂质不参加反应） 查看答案
