很多现象都与摩擦有关，下列四个实例中属于减小摩擦的是（ ） A．在跑鞋的底部有许

Want to save money when travelling by train?

Here are some ways：

Day Returns

This ticket can save you up to 45％ on the standard fare（费用）. You have to travel after the rush hour period Monday—Friday, but can travel at any time on Saturday or Sunday.

Big City Savers

These are special low-priced tickets on certain trains. You have to book in advance（提前）－at the latest by 16：00 the day before you travel. It’s first come, first served.

Weekend Returns

Weekend Returns are available（有售）for most trips over 60 miles. Go on Friday, Saturday or Sunday, and return the same weekend on Saturday or Sunday, and save up to 35％ on the standard fare.

Monthly Returns

These are available for most trips over 65 miles. Go any day and return within a month. Monthly returns save you up to 25％ on the standard fare.

Family Rail Card

For 20 pounds this rail card allows you to take a second adult and up to 4 children for only 3 pounds each when you buy single or return tickets. You can travel as often as you like until the card becomes out of date.

小题1:How many ways does the writer tell us to save money when travelling by train?

A．Five.

B．Four.

C．Three.

D．Six.小题2:Big City Savers are special low-priced tickets on       trains.

A．certain

B．return

C．weekend

D．all小题3:Monthly Returns save you up to     on the standard fare.

A．45％

B．35％

C．25％

D．65％

食物存放久了会腐败变质，其根本原因是 [ ]

A．营养物质含量丰富  

B．含水量高      

C．温度过高    

D．微生物大量生长、繁殖

阅读下面文字，概括关于端午竞渡起源的三种说法。

　　“赛龙船”即龙舟竞渡，是端午节娱乐的主要内容，盛行于南方。闻一多认为，端午节当源于吴越民族举行的龙图腾崇拜活动，理由是吴越民族以龙为图腾，为表“龙子”身份，五月五日举行盛大图腾祭，在急鼓声中用刻画成龙形的独木舟，在水面上作竞渡游戏。此项活动还有两种说法，一是《荆楚岁时记》：“案五月五日竞渡，俗为屈原投汩罗江日，伤其死，故并命舟楫以拯之。”二是《曹娥碑》云：“五月五日，以迎伍君（伍子胥）。”这三种说法，都和端午竞渡有关。

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建设工程纠纷的产生是指建设工程当事人对建设过程中的( )产生了不同的理解。

A．权利义务

B．工程建设分歧意见

C．工程质量

D．竣工时间

简述标点和其他符号的书写特征。