学习“生活中地理”，探索自然与社会的奥秘，我们的人生将更加丰富多彩。某地理学习小

符合中度昏迷表现的是（）。

A.对光反射存在

B.角膜反射存在

C.眼球无转动

D.肌肉松弛

E.浅反射消失

如图所示，粗糙程度均匀的绝缘斜面下方O点处有一正点电荷，带负电的小物体以初速度V₁从M点沿斜面上滑，到达N点时速度为零，然后下滑回到M点，此时速度为V₂（V₂＜V₁）。若小物体电荷量保持不变，OM＝ON，则

A．小物体上升的最大高度为

B．从N到M的过程中，小物体的电势能逐渐减小

C．从M到N的过程中，电场力对小物体先做负功后做正功

D．从N到M的过程中，小物体受到的摩擦力和电场力均是先增大后减小

阅读理解。

     General Airport Tips

     Plan to get to the airport at least an hour early, or two during holidays and other busy times; this will

reduce the stress of the flight. If all goes well, you will have time to relax, shop for last-minute items, or

have a meal before the flight.

      Flight Delays

     Find out why your flight is delayed. Call the free call numbers. Find out if other airlines are experiencing

similar delays. If you believe the delay is due to something other than weather or air traffic problems, then

mention your suspicion (怀疑) and ask the airline agent to book you on the next available flight, either on the

same air-line or a competing one. This is called "Rule 240", and all airlines are required to do it. Use the lingo

(行话); ask,"Can you 240 me?" when speaking with an agent. They will know what you mean.

     Flight Cancellations (取消)

     If your flight is canceled, then make a reservation on the next flight to your destination. Usually, air-line

personnel will try to book everyone on their next flight out. Often they will put you on a competitor's next

flight only if you request it. If on-time arrival is important to you, when you check flights through our

reservation system you can rate your choices based on their on-time arrival records. Be sure to also check the

weather conditions, as they often affect flight schedules.

1. A person goes to the airport ahead of time mainly to _______.

A. buy what he wants in the airport

B. have a good rest in the airplane

C. reduce the pressure of the flight

D. get on the airplane immediately

2. If a person calls "Rule 240", he wants to _______.

A. change for the ticket to the next flight

B. make sure the time for the next plane

C. know if other flights' delays happen

D. ask the reason for the plane delay

3. After a flight cancellation, a passenger can_______.

A. arrive at his destination on time

B. be arranged on a competing flight

C. make sure the weather is quite fine

D. reserve the next flight to your destination

4. The purpose in writing this text is to________.

A. show us how to get on a plane

B. tell us what to do before and after a flight

C. put forward suggestions for a flight

D. teach us actions before an emergency

室外排水管道为了防止堵塞和便于检查、疏通管道，在管道（）等处设置检查井。

A.拐弯

B.直管段较长

C.分支

D.变坡度

金属装饰扣的氧化？