题目:
简述氰化物的鉴定检验。
答案:
参考答案:(1)普鲁士蓝实验。
(2)吡啶—巴比妥酸实验。
简述氰化物的鉴定检验。
参考答案:(1)普鲁士蓝实验。
(2)吡啶—巴比妥酸实验。
下图是部分食肉动物的分类系统图解,下列叙述不正确的是
A.狗是由狼驯化来的,它们的亲缘关系最近
B.狗和狐的共同点比狗和豹的共同点多
C.犬科动物之间的共同特征比犬属动物之间的多
D.种是最基本的分类单位
天然牛黄
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.
Please paraphrase the clause "your actions can speak louder than your words".()
A. Your deeds are better than your words.
B. What you do is better than what you say.
C. You try to show your best manners.
D. You are better understood by your gestures than through your words.
对于高度在5m以内的档土墙一般多采用()。
A、重力式档土墙
B、钢筋砼挡土墙
C、锚杆挡土墙
D、锚定板挡土墙
设定渐变色时,在渐变色条下方单击鼠标,可增加一个表示新颜色的滑块,同时也增加一个表示中间色的菱形,滑块的数量和菱形的数量关系是:()
A.滑块的数量比菱形的数量始终多1
B.滑块的数量比菱形的数量始终少1
C.滑块的数量和菱形的数量相同
D.滑块的数量和菱形的数量是成倍关系