阿肯色苔草属 (Arkansas Carex): 贴吧为植物学愣人了.

新修 2012天9月29日!


好。我美国人。我学阿肯色苔草属(色苔草属:Carex)。This page is page one of several similar pages.

This new page is new has several similar parts. I designed these pages for students in the US from China. China sends about 300,000 students a year to the US. Most earn advanced degrees. We send about 60,000 students to China each year. Most study the Chinese language. This part of my website provides my Chinese friends with information about living in the US, especially about Fayetteville, Arkansas.

This page provides simple hints on how to drive a car. I plan to add many things here later. My goal is to provide things that a driver's license book does not tell you. For now, I will tell you only about one thing. I will add more later.

Suppose you park your car and you notice a fluid dripping from the engine. Should you worry? How should you know what to do? Here are a few hints. First, look at the fluid's color. This will tell you what the problem might be. Be aware that many cars leak fluid. The fluid you see may not be from your car. But if you see a green slippery fluid and it is dripping from your motor, you have a possible problem. Here are some ideas on how to deal with fluid problems. You won't find this information in a driver's training manual from the state.

Fluid is slippery and light brown to black in color: your engine may be leaking oil. Large puddles of oil are usually a very bad sign. But it may only mean that someone failed to tighten the nut when they changed your oil. So this is not always bad. It is very easy to fix if all you need to do is tighten the oil pan lug nut. IMPORTANT: check your oil level in the engine. If you see no oil, DO NOT DRIVE. You can ruin an engine in about 1-2 minutes by driving without oil. Without oil the engine heats up quickly and the parts inside the engine melt together. This ruins the engine. If you do this, you will need to buy a new car or at least a new engine. If the oil light is on, this means you should stop immediately and turn off the engine. Do not start the engine until it has oil.

Fluid is slippery and green in color: this fluid is radiator fluid. It cools the engine. If a little leaks out once, it may just be that the mechanic put too much in the engine and when the engine was turned off, it overflowed. More likely? You have a fluid leak. Check the pipes coming from the radiator. Often they are old and cracked and need to be replaced. More about this later.

Fluid is slippery and reddish in color: transmission fluid. More about this later.

Fluid is watery and clear in color: if you have no antifreeze (radiator fluid) you may have problems similar to the "green" fluid. But most people use antifreeze. So if you see water dripping, it is probably only condensation from the air conditioner. This is normal in hot weather, but never happens if you are not using the air conditioner. More about this later.

Other topics I hope to cover:

Driving techniques of two types: those to learn and those to avoid. For example, remember that you are much more likely to have an accident in your first year of driving. This means you should be extremely careful until you are comfortable "behind the wheel" (= driving a car). Consider this: I once heard it said that to be an experienced driver, you need to drive 100,000 miles. Until you have driven this kind of distance, consider yourself inexperienced. Have you driven on ice? snow? in the rain? Have you hit a deer? Have you driven past a deer standing two feet away from you as you drove by and looked at the deer in the eye? Have you had a "fender bender" (a minor accident)? Have you had another driver stop and yell at you? Until you experience most of these things, you are not an experienced driver.

What to do if your car won't start. Examples: with the engine try to start? Do you get any sound? Do you get an abnormal whining sound rather than the sound of the engine "turning over" (trying to start but not starting)? Does the engine crank, try to start and then quit? All of these things indicate different problems. By learning the problems, you might know what to fix and how easy or hard it is to fix. This can save you money if you can fix it yourself instead of paying someone to come look at your car.

Defensive driving. How to not drive like an idiot!

What to do when something goes wrong. Flat tire? Won't start? Are you out of gas? More later!