问题 问答题 简答题

简述一维条码和二维条码的区别。

答案

参考答案:

由于受信息容量的限制,一维条码仅仅是对“物品”标识,而不是对“物品”的描述。故一维条码的使用,不得不依赖数据库的支持。在没有数据库和不便联网的地方,一维条码的使用受到了较大的限制,有时甚至变提毫无意义。另外,要用一维条码表示汉字的场合,显得十分不方便,且效率很低。现代高新技术的发展,迫切要求用条码在有限的几何空间内表示更多的信息,从而满足千变万化的信息表示的需要。二维条码正是为了解决一维条码无法解决的问题而产生的。

二维条码是在水平和垂直方向的二维空间存储信息的条码,它具有高密度、高可靠性的特点,所以可以用它表示数据文件(包括汉字文件)、图像等。

选择题
阅读理解

阅读理解。

                            Safety and Security Procedures

    Your safety and the security of your personal property are of the primary concern to

those of us who welcome you as our guest. We urge you to take advantage of the following

suggestions.

YOUR VEHICLE

    Lock your vehicle and do not leave money or valuable items inside. We are not

responsible for their loss.

TRAVELING 

    Be good at noticing things around you when sightseeing or traveling. Stay in well-lit

and heavily traveled areas. Don't display large amounts of cash.

GUEST ROOM SECURITY

    For additional security use the deadbolt (插锁) provided on your door and make sure

the windows are locked. As an additional precautious measure, please secure the secondary

locks provided. Do not admit anyone to your room without first making identification. A

one-way viewer is provided in your door to assist with identification. If there is any

doubt about the person's identity, please contact the Front Desk.

SAFETY BOXES

    Do not leave money or valuables in your room or vehicle. We provide free safety boxes

for your use. Hotel is not responsible for items left in room valued over $200.

KEYS

    Safeguard your key. Please do not leave it in the door. Do not give your key to others

or leave it unattended. Please leave your key at the Front Desk when you check out.

REPORTING

    Please report any suspicious activity, or safety concerns to management.

FIRE

    Please familiarize yourself with the nearest fire exits. Report fire or smoke to the

hotel operator. In the unlikely event of a fire, please move quickly and calmly to the

nearest safe exit and leave the building. Avoid the use of elevator.

1. The suggestions are most probably from _____. [ ]

A. a hotel manager

B. a police officer

C. an experienced traveler

D. a tour guide

2. Which of the following is TRUE? [ ]

A. It is advised to travel to places where there are few people.

B. The hotel is not responsible for anything you lose.

C. Don't report to the manager unless you are sure something is going wrong.

D. You'd better use the deadbolt and the secondary locks for safety.

3. If you feel doubtful about a stranger who knocks at the door, you should _____. [ ]

A. let the person in after you have got his/her name

B. open the door to check the person's ID card

C. call the Front Desk to make sure

D. contact the local police for assistance

4. What does the underlined part"In the unlikely event of a fire" mean? [ ]

A. In case a fire happens, though it is not very possible.

B. If a fire happens when some big events are taking place.

C. In case a fire happens in a public building.

D. If a fire breaks out and it is getting out of control.