在墙上留置临时施工洞口，其侧边离交接处墙面不应小于500mm，洞口净宽度不应超过(

下列说法错误的是（　　）

A．数轴上表示-2的点与表示+2的点的距离是2

B．数轴上原点表示的数是0

C．所有的有理数都可以用数轴上的点表示出来

D．最大的负整数是-1

阅读理解。

     While travelling, you'll be taking money, license or passport. Or you will buy something expensive

to take back home with you and you don't want it to get stolen. Here are some ideas on how to keep

your valuables (贵重物品) safe while traveling

      Plan ahead of time

      Think of what you really need and don't need to take on your trip. Only take the valuables that

you must have, not just ones that you would like to have.

      Carry your valuables on your person

      Something that is small, like cash and credit cards and your passport, can be carried in a money

wallet around your neck or in a money belt. This way, your valuables are hidden and right next to you,

where you know where they are at all times. Wear clothing that can hide the money belt.

      Carry larger valuables in your carry-on bag.

      If you can't fit it in your money wallet like some large valuables, you'd better put them somewhere

that you will keep touch with them. Your can put them on the plane, so you don't have to worry about

the airline losing your bag or someone stealing it from the belt after the flight before you get to it.

      Choose a hotel that has the front desk for valuables.

      This way, you don't have to worry about housekeeping getting hold of your valuables, or someone

stealing your valuables if your room is broken into. If you give the valuables to the front desk to keep

for you, choose a time when others are not looking.

1. The passage is mainly about _______.

A. what to do while travelling

B. how to carry your valuables on your person

C. how to keep your valuables safe while traveling

D. how to save money while travelling

2. You can carry all of the following valuables on your person EXCEPT _______.

A. your cash  

B. credit cards  

C. your passport    

D. your large valuables

3. Which kind of hotel can you choose while travelling according to the text?

A. You can choose a hotel with a lot of housekeepers for valuables.

B. You can choose a hotel with the front desk for valuables.

C. You can choose some cheap hotel.

D. You can choose a hotel with gatekeepers.

4. When you plan your travel ahead of time, you should make sure that _______.

A. you take valuables that you must have

B. you take valuables as many as possible

C. you take valuables that you would like to have

D. you take valuables that you have at home

5. Which of the following is TRUE according to the text?

A. Anything small must be carried in a money wallet around your neck.

B. You give valuables to the front desk at a hotel when others are looking.

C. You should wear a tight shirt while travelling.

D. You'd better put some large valuables in your carry-on bag.

检验人员将所抽的平均样品应在抽样后( )内送到检验室。

A．12小时

B．24小时

C．28小时

D．30小时

简述一般意识状态的分级划分。

Questions 63 TO 67 are based on the following passage:(10分)　　Television,the modern wonder of electronics,brings the world into your own home in sight and sound.And the word‘television’means seeing far.Television works in much the same way as radio.In radio,sound is changed into electromagnetic waves which are sent through the air.Experiments leading to modern television took place more than a hundred years ago.By the 1920s inventors and researchers had turned,the early theories into working models.Yet it took another thirty years for TV to become industry. The influence of TV on the life of people is incalculable:it can influence their thoughts and their way of life.It can also add to their store of knowledge.Educational TV stations offer teaching in various subjects.Some hospitals use TV for medical students to get close-up views of operations. At first television programs were broadcast in black-and-white.With the development of science and technology,the problem of how to telecast them in full color was solved and by the middle 1960s the national networks were broadcasting most of their programs in color. The programs that people watch are not only local and national ones.Since the launching of the first communications satellite,more and more programs are telecast“live”from all over the world. People in San Francisco were able to watch the 1964 Olympic Games in Tokyo.And live telecasts now come from outer space.In 1969,the first astronauts to land on the moon televised their historic “moon walk”to viewers on the earth.Since then,astronauts have regularly sent telecast to the earth.

The word“incalculable”means__________.

A．easy to tell

B．very great

C．difficult to tell

D．very small