首页 > 工程管理> 工程安全与环境管理

网友您好，请在下方输入框内输入要搜索的题目：

请输入或粘贴题目内容搜题

搜题

拍照、语音搜题，请扫码下载APP

题目内容（请给出正确答案）

[主观题]

The most general approach to visibility is dE=-Ebextdx （2.5) where E is the light intensity of a c

The most general approach to visibility is

dE=-Eb_extdx (2.5)

where E is the light intensity of a collimated beam of light, b_extis the extinction coefficient, which is the sum of the four separate b values for light scattering and absorption by gas molecules and by particles, and x is the distance [28]. If the air mass through which one views a distant object is uniform, so that bext is constant, this may be integrated to

$The most general approach to visibility is dE=-Eb$ (2.6)

The Koschmeider equation [Eq.(2.4)]is based on the visual range corresponding to E/E₀=0.02 when L_V=Δx.

答案

查看答案

发布时间：2022-12-03

更多“The most general approach to visibility is dE=-Ebextdx （2.5) where E is the light intensity of a c”相关的问题

第1题

In general, ______ tend to be the most energy efficient one. A．older laptops B．older desktops C．n

In general, ______ tend to be the most energy efficient one.

A．older laptops B．older desktops

C．newer desktops D．newer laptops

点击查看答案

第2题

______, most teenagers now listen to rock musicHowever, John prefers classical music.A．In

______, most teenagers now listen to rock musicHowever, John prefers classical music.

A．In a word

B．In general

C．In particular

D．In total

点击查看答案

第3题

______ , most teenagers now listen to rock music. However, John prefers classical music.A．

______ , most teenagers now listen to rock music. However, John prefers classical music.

A．In a word

B．In general

C．In particular

D．In total

点击查看答案

第4题

What syllabus will describe the following situations that the learner might find himse

lf in,the language activities he is most likely to take part in,the functions of language that are most useful ,the topics that are important and common and the general notions which he might need to express？()

A. Structural syllabus.

B. Communicative syllabus.

C. Situational syllabus.

点击查看答案

第5题

The upper class is also called the out-of-sight class because______.A．they don" t communic

The upper class is also called the out-of-sight class because______.

A．they don" t communicate with any people

B．they spend most of their time abroad

C．they move frequently from the general public

D．they keep away from the general public

点击查看答案

第6题

What does the writer of this ad intend to say by naming General Electric, IBM, Ford, etc.？

A．To show that their training is widely used in the country.

B．To show that the training program is fully supported by famous companies in the U. S.

C．To prove the value of their training in every area.

D．To show the importance of getting recognized by the most famous companies.

点击查看答案

第7题

从供选择的答案中选出应填入下面一段英文中______内的正确答案。 Video RAM means in general all forms of

从供选择的答案中选出应填入下面一段英文中______内的正确答案。

Video RAM means in general all forms of RAM used to(1). image data for the video display monitor. Somewhat confusingly, the most common(2)of video RAM is called Video RAM (VRAM). All types of video RAM are special(3)of dynamic RAM (DRAM). Video RAM is really a buffer(4)the processor and the display monitor and is often called the frame buffer. When(5)are to be sent to the display, they are first read by the processor as data from some form of main storage RAM and then(6)to video RAM. From video RAM (the frame buffer), the data is converted by a RAM digital-to-analog converter (RAMDAC) into analog(7)that are sent to the display presentation mechanism such as a cathode ray tube (CRT). Usually, video RAM comes in a 1 or 2 megabyte package and is(8)on the video or graphics card in the computer. Most forms of video RAM are dual-ported. While the processor is writing a new image to video RAM, the display is reading from video to(9)its current display content. The dual-port design is the main(10)between main storage RAM and video RAM.

供选择的答案：

1．difference 2．located 3．images 4．store 5．between

6．type 7．written 8．refresh 9．arrangements 10．signals

点击查看答案

第8题

The two most common kinds of logic or reasoning are inductive and deductive. Inductiv

The two most common kinds of logic or reasoning are inductive and deductive.

Inductive reasoning is mainly scientific and factual it begins with collected data,experiments. and examples.When enough information has been colleted,a statement of aprinciple is taken from the examples.

Deductive reasoning begins with a general principle and applies it to a specifie instance or specific instances The conclusions of deduetive thinkers are more tentative than the conclusions of inductive thinkers, who arrive at a principle instead of starting from one.Deductive thinkers are accurate only to the extent that their principle is correct and only to the extent that they have applied it truly.

Both inductive thinking and deductive thinking are tested. and questioned by those to whom the conclusions are presented. Of an inductive thinker,one asks whether the facts are true. whether the exceptions have been noted, whether the selection of materials is representative. whether the conclusions are truly and accurately drawn from the data,whether the conclusions are stated precisely or exaggerated(夸大的). Of a deductive thinker, one asks whether the given principle is impartial truth or mere personal opinion,whether it is applied to materials relevantly,whether the conclusion is accurate according to the principie, and whether exceptions have been noted.

With good motives and bad, with bonesty and with deceit. different thinkers teach different conclusions derived from the same data or from the same principle. What is the difference between inductive thinking and deductive thinking？

A.Inductive thinking starts from data, experiments and examples and then arrives at a principle,while deductive thinking starts only from data

B.Inductive thinking starts from a principle,and then applies it to a specifie instance or specific instances, while deductive thinking starts from data experiments and examples and then arrives at a principle

C.Inductive thinking starts from data, experiments and examples and then arrives at a principle,while deductive thinking starts from a general principle,and then applies it to a specific instance or specific instances

D.Inductive thinking starts from data and then applies them to specific instances,while deduetive thinking starts from experiments and then appliesthem to specific instances

Which one of the following should an inductive thinker pay attention to？A.Whether the general principle is impartial truth or mere personal opinion.

B.Whether he is honest or not.

C.Whether the facts are true or not

D.Whether the general principle is applied to material relevantly.

The common concern for inductive thinkers and deductive thinkers is___A.whether the exceptions have been noticed

B.whether they are bearing good motives or not

C.whether the conclusions are derived from the same data

D.whether they starts from the same general principle

Which statement among the following is true？A.Deductive thinking is mainly scientific and factual

B.The deductive thinkers will never be accurate

C.Both inductive thinking and deductive thinking are tested and questioned by those to whom the conclusions are presented

D.One will not care about whether the facts used by an inductive thinker are representative or not

请帮忙给出每个问题的正确答案和分析，谢谢！

点击查看答案

第9题

There is no doubt that adults, and even highly educated adults, vary gready in the speed a

nd efficiency of their reading. Some proceed very slowly throughout; others dash along too quickly and then have to regress. Poor readers in particular may lack the ability to vary their manner of reading according to the type of reading matter and to their intentions in reading it. A good reader can move at great speed through the text of a novel or similar light reading matter. He may be able to skim a page, picking up a word or two here and there, and gain a general idea of what the text is about without really reading it. In reading more difficult material, with the intention of taking in the whole of it, he will proceed more slowly, but even then he will vary his pace, concentrating on the key words and passages , perhaps re-reading them several times and pass more quickly over the remainder. A less efficient reader tends to maintain the same speed whatever the material he reads.Consequendy, even light reading matter gives him little pleasure because he reads so slowly. But this pace may be too fast for really difficult material which requires special concentration at difficult points. A type of reading which necessitates careful attention to detail is proofreading, in which the reader, in order to detect misprints in a sample print, has to notice not so much the meaning of what he reads as the exact shape and order of letters and words in the text. This is extremely difficult for most people, since they are accustomed to overlooking such details. In fact, considerable practice is required to practice this task efficiently and it can be done only by reading very slowly, and by paying comparatively litde attention to the general meaning of the text.

The author claims that there is a difference in reading speed______.

A．among readers who have different experience

B．among all the readers

C．between the poorly educated and the highly educated

D．among the highly educated people

点击查看答案

第10题

Though it is merely 1 to 3 percent of the population, the upper class possesses at least 2

5 percent of the nation s wealth. This has two segments; upper-upper and lower-upper. Basically, the upper-upper class is the "old rich"—families that have been wealthy for several generations—an aristocracy of birth and wealth. Their names are in the Social Register, a listing of acceptable members of high society. A few are known across the nation, such as the Rockefellers, Roose-velts, and Vanderbilts. Most are not visible to the general public. They live in grand seclusion(过着显赫的退隐生活), drawing their income from the investment of their inherited wealth. In contrast , the lower-upper class is the " new rich". Although they may be wealthier than some of the old rich, the new rich have hustled(拼命干)to make their money like everybody else beneath their class. Thus their prestige is generally lower than that of the old rich, who have not found it necessary to lift a finger to make their money, and who tend to look down upon the new rich. However its wealth is acquired, the upper class is very rich. They have enough money and leisure time to cultivate an interest in the arts and to collect rare books, paintings, and sculptures. They generally live in exclusive areas, belong to exclusive social clubs, communicate with each other, and marry their own kind—all of which keeps them so distant from the masses that they have been called the out-of-sight class. More than any other class, they tend to be conscious of being members of a class. They also command an enormous amount of power and influence here and abroad, as they hold many top government positions, run the Council on Foreign Relations and control multinational corporations. Their actions affect the lives of millions.

All the following statements are true except that______.

A．the upper class owns at least a quarter of the country" s wealth

B．the "old rich" enjoy higher prestige than the "new rich"

C．the "old rich" isolate themselves and lead a lonely life

D．the upper-upper class is of aristocratic origin

点击查看答案

第11题

全身麻醉（general anesthesia)

全身麻醉(general anesthesia)

点击查看答案