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[主观题]

Everyone uses the expressions AM and PM. But do you exactly know what they mean and how th

ey came into being？

As you know, the turning of the earth makes the sun and the stars seem to move across the sky. Daylight, of course,【21】, when the sun rises in the east and when the sun is high【22】the sky, between these two positions, half of the daylight hours have been spent.

Therefore, by noticing【23】the sun stood in the sky, early man know they could tell the time of the day, At night the motion of the stars【24】the same purpose. The important thing in keeping time is to know the exact moment of【25】. For each of us, wherever we are, noon is when the sun is directly overhead. Think of an imaginary line【26】the sky, stretching from the north point of your horizon just to the south point.

When the sun cross your meridian (子午线), it is noon for you. When the sun still【27】of this line, or the meridian, it is morning. After the sun has crossed this line, it is【28】.

The Latin word for "midday" is "deridian",【29】which comes our word meridian. So AM is an abbreviation (缩写词) for "ante meridean", or before midday, and PM for after midday. Each or the world's time zones (时区) is about fifteen degrees wide in longitude (经度), which is about the distance the sun moves through tile sky in all hour.【30】lives in the same time zone observes noon at the same moment. In this way, the time is different by one hour as you move through each time zone.

(61)

A．comes

B．begins

C．appears

D．shines

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发布时间：2022-01-26

更多“Everyone uses the expressions AM and PM. But do you exactly know what they mean and how th”相关的问题

第1题

填空：Everyone ？ of the President of the US ？ the most powerful man in ？

Directions: There are 20 blanks in the following passage. For each blank there are four choices marked A), B), C) and D). You should choose the ONE that best fits into the passage.

Everyone ___71___ of the President of the US ___72___ the most powerful man in ___73___. But when the representatives of the 13 former British colonies ___74___ to draw up the constitution of the new country ___75___ 1788, ___76___ of them were not sure whether they ___77___ to have a President at all. There were even ___78___ who ___79___ a king, ___80___ their successful war against the British king, George III. The decision was in doubt ___81___ the last moment. One group wanted ___82___ for life, while ___83___ suggested that ___84___ not be a President, because a Committee would govern the country better; a third group ___85___ a President ___86___ term of office would last seven years but who could not stand for reelection, because they were afraid he would spend his time ___87___ votes at the next election. In the end they chose George Washington as President for four years and let him ___88___ for reelection because they trusted him. But they were ___89___ to make rules in case a future President ___90___ badly and these rules were used to get rid of President Nixon two hundreds years later.

71. A) use to think B) think C) thinks D) uses to think

72. A) to be B) being C) like D) as

73. A) western world B) the western world C) accident D) the accident

74. A) found B) met C) encountered D) put together

75. A) at B) by C) on D) in

76. A) a number B) a great deal C) a large amount D) the most

77. A) should B) would C) needed D) must

78. A) few B) a few C) little D) a little

79. A) had preferred B) would have preferred

C) should have preferred D) were preferring

80. A) although B) however C) nevertheless D) in spite of

81. A) until B) as far as C) so far as D) by

82. A) that the President was elected

B) that the President would be elected

C) to elect the President

D) to be elected the President

83. A) another B) other C) the other D) some other

84. A) it should B) it would C) there should D) there would

85. A) would have liked B) would rather C) would like D) would be liking

86. A) that's B) whose C) which D) of which

87. A) looking for B) to look for C) to look at D) looking at

88. A) stand B) to stand C) be standing D) that he stood

89. A) so careful B) too careful C) careful enough D) enough careful

90. A) would carry B) carried C) would behave D) behaved

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第2题

As regards social conventions, we must say a word about the English class system. This is

an embarrassing subject for English people, and one they tend to be ashamed of, though during the present century class-consciousness has grown less and less. But it still exists. Broadly speaking, it means there are two classes, the "middle class" and the "working class" (We shall ignore for a moment the old "upper class", since it is extremely small in numbers; but some of its members have the right to sit in the House of Lords, and some newspapers take a surprising interest in their private life.) The middle class consists chiefly of businessmen and professional people of all kinds. The working class consists chiefly of manual and unskilled workers.

The most obvious difference between them is in their accent. Middle-class people use slightly varying kinds of "received pronunciation" which is the kind of English spoken by BBC announcers and taught to overseas pupils. Typical working-class people speak in many different local accents which are generally felt to be rather ugly and uneducated. One of the biggest barriers of social equality in England is the two-class education system. To have been to a so-called "public school" immediately marks you out as one of the middle class. The middle classes tend to live a more formal life. Their midday meal is "lunch" and they have a rather formal evening meal called "dinner", whereas the working man's dinner, if his working hours permit, is at midday, and his smaller, late-evening meal is called supper.

It has been government policy to reduce class distinctions. Working-class students commonly receive a university education and enter the professions, and working-class incomes have grown so much recently. However, regardless of one's social status, certain standards of politeness are expected of everybody, and a well-bred person is polite to everyone he meets, and treats a laborer with the same respect he gives an important businessman. Servility inspires both embarrassment and dislike. Even the word "sir", except in school and in certain occupations (e.g. commerce, the army etc.) sounds too servile to be commonly used.

The "upper class" in England today______.

A．are extremely small in number so that media pays no attention to them

B．still uses old words like "sir" in their everyday life

C．can sits in the House of Lords

D．refers only to the royal family

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第3题

One argument used to support the idea that employment will continue to be the dominant for

m. of work, and that employment will eventually become available for all who want it, is that working time will continue to fall. People in jobs will work fewer hours in the day, fewer days in the week, fewer weeks in the year, and fewer years in a lifetime, than they do now. This will mean that more jobs will be available for more people. This, it is said, is the way we should set about restoring full employment.

There is no doubt that something of this kind will happen. The shorter working week, longer holidays, earlier retirement, job-sharing -- these and other ways of reducing the amount of time people spend on their jobs -- are certainly likely to spread. A mix of part-time paid work and part-time unpaid work is likely to become a much more common work pattern than today, and a flexi-life pattern of work -- involving paid employment at certain stages of life, but not at others -- will become widespread. But it is surely unrealistic to assume that this will make it possible to restore full employment as the dominant form. of work.

In the first place, so long as employment remains the overwhelmingly important form. of work and source of income for most people that it is today, it is very difficult to see how reductions in employees' working time can take place on a scale sufficiently large and at a pace sufficiently fast to make it possible to share out the available paid employment to everyone who wants it. Such negotiations as there have recently been, for example in Britain and Germany, about the possibility of introducing a 35-hour working week, have highlighted some of the difficulties. But, secondly, if changes of this kind were to take place at a pace and on a scale sufficient to make it possible to share employment among all who wanted it, the resulting situation --in which most people would not be working in their jobs for more than two or three short days a week -- could hardly continue to be one in which employment was still regarded as the only truly valid form. of work. There would be so many people spending so much of their time on other activities, including other forms of useful work, that the primacy of employment would be bound to be called into question, at least to some extent.

The author uses the negotiations in Britain and Germany as an example to

A．support reductions in employees' working time.

B．indicate employees are unwilling to share jobs.

C．prove the possibility of sharing paid employment.

D．show that employment will lose its dominance.

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第4题

电器设备上“EX”、“KY”分别是指什么？

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第5题

Ex “m” 设备适用的区域（）

A.都可用于ZONE 0区

B.Ex ma可用于ZONE 0,1,2区;Ex mb 可用于ZONE 1,2 区

C.任何区域都可用

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第6题

设随机变量X的概率密度为：设随机变量X的概率密度为：求：（1）EX；（2）DX。求：（1）EX；（2）DX。

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第7题

拉伸命令的快捷键是（)。

A.LEN

B.S

C.EX

D.AR

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第8题

在电气设备中EX表示防爆标志。（）

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第9题

下列微分方程中，( )是线性微分方程。

A.yx²+lny=y’

B.y'y+xy²=e^x

C.y''+xy'=e^y

D.y''sinx-y'e^x=ylnx

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第10题

防爆设备总标志（）。

A.MA

B.KB

C.EX

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