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问题 单项选择题

地质构造是指岩层在地壳运动作用下，引起地壳变形变位，保留在岩层中的构造，包括褶皱构造、断层构造两种。下列关于地质构造的说法，正确的是( )。

A．褶皱是地壳的垂直运动，产生的挤压使岩层发生弯曲变形
B．褶皱地带易发育成谷地或低地，典型的如渭河平原、汾河谷地等
C．背斜是岩层上凸的弯曲，向斜是岩层下凹的弯曲；背斜岩层中间新两端老，向斜则中间老两端新
D．断层一侧上升的岩块，容易形成块状山地或高地，例如华山、庐山

答案

参考答案：D

解析： 褶皱是地壳的．水平运动，产生的挤压使岩层发生弯曲变形。断层是地壳的垂直运动，使岩层发生断裂，断裂面两侧岩块有明显错动，故A项错误。断层一侧上升的岩块，容易形成块状山地或高地，例如华山、庐山；另一侧则常形成谷地或低地，如我国的渭河平原、汾河谷地等，故B项错误，D项正确。背斜岩层中间老两端新，向斜则中间新两端老，故C项错误。本题正确答案为D。

判断题

滾动轴承的滾子和滾道是曲面接触，除滾动外不存在少许滑动。
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单项选择题

(三)


When you are in another country, it is important to know the language, but it is equally important to know how to communicate nonverbally, before saying anything by making gestures. According to a pioneer in nonverbal communication, only 20 to 35 percent of our communication is verbal. When people don’t know the language, the" most common way to communicate is through gestures. However, many gestures have different meanings, or no meaning at all in different parts of the world.
In the United States, for example, nodding your head up and down means "yes". In some parts of Greece and Turkey, however, this motion can mean "no”. In Southeast Asia, nodding your head is a polite way of saying "I’ve heard you".
"In ancient Rome, when the emperor wanted to spare someone’s life, he would put his thumb up. Today in the United States, when someone puts his/her thumb up, it means "Everything is all right". However, in Sardinia and Greece, the gesture is insulting and should not be used there.
In the United States, raising your clasped hands above your head means "I’m the champion" or "I’m the winner". It is the sign prizefighters make when they win a fight. When a leading Russian statesman made this gesture after a White House meeting, Americans misunderstood and thought he meant he was a winner. In Russia, however, it is a sign of friendship.
In the United States, holding your hand up with the thumb and index finger in a circle and the other three fingers spread out means "Everything is OK" and is frequently used by astronauts and politicians. In France and Belgium, it can mean "You’re worth nothing. "
There are other nonverbal signals that people should be aware of when they go to another country, such as the distance to maintain between speakers. Americans usually feel comfortable when speaking with someone if the distance between them is about eighteen inches to arm’s length. Anything closer makes them feel uncomfortable.
When talking to Americans, it is also important to make eye contact. If you look down when talking to an American, he/she may feel that you are embarrassed, afraid, or trying to hide something.
In addition to knowing how to communicate nonverbally in a country, it is important to know what you and he cannot discuss. In the United States, there are certain topics to avoid when you first meet someone, For example, don’t ask people their age, weight, religion, marital status, how much money they earn, or how much something costs. You can talk about work, the weather, traffic problems, sports, food, news of the day, where one lives, consumer subjects (computers, car repairs, and so forth), and travel or vacation plans.
These few examples illustrate that your actions can speak louder than your words. In a particular cultural contest, what you say and what you don’t say are equally important.

As we can see from the passage there are ______ kinds of nonverbal communication signals.

A．four

B．five

C．six

D．seven
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