题目内容

关于轻轨的描述正确的是（）。

A. 最小曲线半径可达30M。
B. 线路工程量小
C. 车辆轻
D. 建造成本低

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轻轨有它自己的信号系统，但是不需要像铁路一样复杂。

A. 对
B. 错

根据所学音标，选择不同发音

A. sea
B. this
C. say
D. nose

关于结构化为类选择器的描述，下列说法正确的是（）。

A. 可以减少文档内class属性和id属性的定义，使文档变得更加简洁。
B. 主要包括子代选择器和兄弟选择器。
C. 一般是一个标签后紧跟中括号“[]”，中括号内部是属性或者属性表达式
D. 以上都不对

Reading comprehension.Subways are underground trains, which usually operate 24 hours a day. They are found in larger cities and usually run between the suburbs and the downtown area. Maps and schedules are available from the ticket offices. If you take the subway often, you can save money by purchasing a monthly pass(月票).City-operated buses run on various routes(线路)and are designed to be at certain places at certain times. Maps and schedules may be posted at certain stops，or they may be available at local banks，libraries，the student union，or from the bus drivers. Buses run mainly during the day. Fare is paid by exact change in coins, or by monthly passes.Taxis are generally more expensive in the United States than in other countries. If you use a taxi，be sure you ask the amount of the fare before you agree to ride. The driver usually expects a tip(小费)of 15 percent of the fare.According to the passage, subways as underground trains, which usually run____.

A. within downtown areas
B. away from city centers
C. in or outside big modern cities
D. between suburbs and city centers