阅读理解

    Singapore's public transport system is one of the best in the world, so you should have no problem finding your way around like a local. There are three main forms of public transport that you would find in any other major city—trains, buses and taxis.

    TRAINS

    Trains run from 6:00 am to midnight. Single trip tickets start at 80 cents. If you buy an EZ-Link cars for $15, you can ride the trains and buses as you like.

    If you need more information, just call Transit Link on 1800 525 7333.

    BUSES

    There are several bus services in Singapore and fares start at 80 cents. Be sure always ask the driver the cost of your ticket as he can not give change.

    If you need help, just call Transit Link on 1800 525 7333.

    TAXIS

    There are three main taxi companies—City Cab (6552 2222), Comfort (6552 1111) and Tibs (6552 8888). Booking can also be easily by calling the numbers listed above.

    RENTAL CARS

    Driving in Singapore is a pleasure and if you liked to travel at your own pace, renting a car is a good choice. Renting takes away the hassle of getting to places around Singapore. Just sit back and enjoy the city. It also means you'll get to see a lot more that a train or a bus won't let you see.

    For car rental, call Avis on + 65 6737 1668.

江苏梦兰集团和中科院合作组建“中科梦兰”龙芯产业化基地，梦兰集团提供资金和土地，中科院提供核心技术“龙芯1号”，使第一款使用中国人自主研发CPU龙芯的电脑在江苏开始批量生产。这一做法                                  （   ）
①有利于我国自主知识产权的科技成果转化
②有利于提高企业的核心竞争力
③表明企业已经成为技术创新的主体
④说明采用新技术一定能大幅度提高企业经济效益

如图所示，某种确定材料的圆柱形导体横截面的直径为d、长为L，其两端所加的电压为U，当这三个物理量中仅有一个物理量改变时，关于导体中自由电子定向运动的平均速率，下列说法正确是

根据植物光合作用和呼吸作用的原理，下列措施不能提高大棚蔬菜产量的是（  ）

图一是地球公转示意图，①②③④分别表示二分二至4个节气地球在公转轨道上所处的位置，图二是太阳直射点回归运动示意图，读图完成下列要求。