A substance that contains only one kind of atom is a (an) …
We should arrive _______ Paris at six in the morning.
Выберите слова или словосочетания для заполнения пропусков так, чтобы они отражали особенности оформления служебной записки:
To: (1) Janet Benson, ______
From: (2) _______, Manager
Subject : (3) _____
(4) _____ :4 September 2009
I’m writing to inform you that Booklet of Our Services is not ready.
The Publishing Department definitely needs some assistance. Otherwise they will not meet the deadline.
Oliver Knott
The letter must be as _______ as possible.
Food which is served in Mc Donald’s is called …
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Thermal radiation
1. Thermal radiation is electromagnetic radiation generated by the thermal motion of charged particles in matter. All matter with a temperature greater than absolute zero emits thermal radiation. The mechanism is that bodies with a temperature above absolute zero have atoms or molecules with kinetic energies which are changing, and these changes result in charge-acceleration and/or dipole oscillation of the charges that compose the atoms. This motion of charges produces electromagnetic radiation in the usual way. However, the side spectrum of this radiation reflects the wide spectrum of energies and accelerations of the charges in any piece of matter at even a single temperature.
2. Examples of thermal radiation include the visible light and infrared light emitted by an incandescent light bulb, the infrared radiation emitted by animals and detectable with an infrared camera, and the cosmic microwave background radiation. Thermal radiation is different from thermal convection and thermal conduction – a person near a raging bonfire feels radiant heating from the fire, even if the surrounding air is very cold.
3. Sunlight is thermal radiation generated by the hot plasma of the Sun. The Earth also emits thermal radiation, but at a much lower intensity and different spectral distribution (infrared rather than visible) because it is cooler. The Earth’s absorption of solar radiation, followed by its outgoing thermal radiation are the two most important processes that determine the temperature and climate of the Earth.
Thermal radiation occurs …
We fastened our seatbelts and soon the plane took …
Выберите слова или словосочетания для заполнения пропусков так, чтобы они отражали особенности оформления служебной записки:
To: (1)_____, Administrative Assistant
(2) _____ : Sally Thomas, PA to Chairman
Date: 30 August
Subject: (3) _____
Many congratulations on recently joining the staff in the Chairman’s office. I hope you will be happy here.
I am enclosing a booklet explaining the company’s general rules regarding document formats.
(4)______
My new job is ______ than the old one. I work fewer hours and earn more.
If you want to get a good job, you ________ learn foreign languages.