题干

下列各组的两种物质在溶液中的反应,可用同一离子方程式表示的是(   )

A:氢氧化钠与盐酸;氢氧化钾与碳酸

B:BaCl2溶液与Na2SO4溶液;Ba(OH)2溶液与H2SO4溶液

C:NaHCO3溶液与KHSO4溶液;Ca(HCO3)2溶液与过量HCl溶液

D:氧化钠与稀盐酸混合;氧化铜与稀盐酸

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C

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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.