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列方程解应用题:由甲地到乙地前三分之二的路是高速公路,后三分之一的路是普通公路,高速公路和普通公路交界处是丙地.A车在高速公路和普通公路的行驶速度都是80千米/时;B车在高速公路上的行驶速度是100千米/时,在普通公路上的行驶速度是70千米/时,A,B两车分别从甲、乙两地同时出发相向行驶,在高速公路上距离丙地40千米处相遇,求甲、乙两地之间的距离是多少?
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解:设甲、乙两地之间的距离是x千米,

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    Traveling to all corners of the world gets easier and easier. We live in a global village, but this doesn't mean that we all behave in the same way.

    How should you behave when you meet someone for the first time?____In Japan, you should bow, and the more respect you want to show, the deeper you should bow. In Thailand, people greet each other by pressing both hands together at the chest.____

    ____ In Muslim countries, you shouldn't expose your body, especially women, who should wear long blouses and skirts. In Korea, you should take off your shoes when entering a house. Remember to place them neatly together where you come in.

    In Spain, lunch is often the biggest meal of the day, and can last two or three hours.____ In Mexico, lunch is the time to relax, and many people prefer not to discuss business as they eat. In Britain, it's not unusual to have a business meeting over breakfast.

    In most countries, an exchange of business cards is necessary for all introductions. It should include your company name and your position. If you are going to a country where your language is not widely spoken, you can get the back side of your card printed in the local language.____

A. For this reason, many people eat a light breakfast and a late dinner.

B. As the saying goes, "when in Rome, do as the Romans do."

C. In both countries, eye contact is avoided as a sign of respect.

D. In China, you may present your card with the writing side up.

E. An American shakes your hand while looking into your eyes.

F. Many countries have rules about what you should and shouldn't wear.

G. Don't make any noise when you eat or drink soup.