Воздействие электромагнитного излучения на организм человека. 3 страница

275. Choose the correct variant: I think that’s _____ film I’ve ever seen

A) The funniest

B) The funnier than

C) The funny

D) The funnier

E) The funnyest

276. Choose the correct variant: Is football the _____ sport in Chile?

A) Popularest

B) Most popular

C) More popular

D) Popular

E) The most popular

277. Choose the correct variant: Vegetables are _____ last week.

A) More expensive than

B) Expensiver than

C) More expensivertham

D) Most expensive

E) The most expensive

278. Choose the correct variant: I think Vladimir is _____ intelligent person in the class.

A) Most

B) More than

C) The most

D) The more

E) Mostest

279. Choose the correct variant: Don’t you think there are _____ things to do on holidays than watching TV all day?

A) Bestest

B) Best

C) Better

D) Better than

E) Beter

280. Choose the correct variant: Summer is _____ season in our country.

A) Hot

B) Hotter than

C) The hot

D) The hottest

E) The hotest

281. Choose the correct variant: Greenland has the _____ weather of the world. It’s always raining and snowing.

A) Baddest

B) Bad

C) Worse than

D) Worsest

E) Worst

282. Choose the correct variant: The Everest is _____ the Aconcagua.

A) The higher than

B) The highest

C) Highest than

D) Higher than

E) High than

283. Choose the correct variant: Last week we had _____ day in Santiago, the temperature was –18ºC.

A) Coldest

B) The colder

C) The cold

D) Colder than

E) The coldest

284. Choose the correct variant: To fall from a motorcycle is _____ to fall from a bicycle.

A) Painfuller than

B) More painful

C) More painful than

D) The painfullest

E) Painful than

285. Choose the correct variant: If you suffer asthma, don’t go to Mexico City. It is one of the _____ cities in the world.

A) Polluter than

B) Pollutest

C) More polluted

D) Most polluted

E) The most polluted

286. Choose the correct variant: The _____ place from Chile is Australia. It’s on the other side of the world.

A) Farthest

B) Farther

C) Farther than

D) Farthest than

E) The farthest

287. Choose the correct variant: I don’t think your bike is _____ mine.

A) Fast than

B) Fastest than

C) Faster

D) Fastest

E) Faster than

288. Choose the correct variant: Michael was _____ basketball player in the world.

A) The tallest

B) Taller

C) Tallest

D) The taller

E) The tall

289. Choose the correct variant: Speaking Japanese is _____writing it.

A) Easy than

B) The easiest

C) Easy

D) Easyer than

E) Easier than

290. Correct the mistake. I’ve been here since three days.

A) Into three days

B) In three days

C) To three days

D) For three days

E) Within three days

291. Choose the sentence with the superlative degree of adjective.

A) My boat is as expensive as your boat.

B) This song is better than the previous one.

C) Peter is the most intelligent student in the school!

D) This book is as bad as that one.

E) Jurassic Park is less frightening than Star Wars.

292. Choose the sentence with the superlative degree of adjective.

A) Sandra is prettier than Sophia.

B) This museum is the least interesting place of the town.

C) My boat is as expensive as your boat.

D) The Lost World is less good than Jurassic Park I.

E) Jurassic Park is less frightening than Star Wars.

293. Choose the sentence with the superlative degree of adjective.

A) Your grade is worse than mine.

B) My house is bigger than yours.

C) The runt of the litter is the smallest.

D) The Pacific Ocean is deeper than the Arctic Ocean.

E) You are more polite than Joey.

294. Choose the sentence with the superlative degree of adjective.

A) My brother is taller than me, but he is younger, too.

B) Jupiter is the biggest planet in our Solar System.

C) A rose is more beautiful than a daisy.

D) The Earth is larger in diameter than the moon.

E) A pint is less than a quart.

295. Choose the sentence with the comparative degree of adjective.

A) This is the most interesting book I have ever read.

B) She is the smartest girl in our class.

C) I am the shortest person in my family.

D) Learning Japanese is more difficult than leaning Italian.

E) Jerry is the least worried about the game.

296. Choose the sentence with the comparative degree of adjective.

A) Learning Japanese is more difficult than leaning Italian.

B) That was the best movie ever.

C) Sam is the most handsome boy in the whole school.

D) Mount Everest is the highest mountain in the world.

E) Jerry is the least worried about the game.

297. Choose the correct variant: He is very loud he should behave___________.

A) Quiet

B) Quieter

C) More quiet

D) More quietly

E) Quietest

298. Choose the correct variant: He was driving at a hundred miles an hour, he should have driven____________.

A) More slowly

B) Slower

C) Much slowlier

D) Slowly

E) Slowlier

299. Choose the correct variant: He did_______ in his driving test -________ than we expected.

A) Badly, worser

B) Bad, worse

C) Very badly, worse

D) Badly, worsest

E) Bad, worser

300. Choose the correct variant: I bought _______ edition of today’s paper. No copies were left.

A) The least

B) The latest

C) The last

D) The lastest

E) The leastest

электромагнитные поля составляют особую форму материи – совокупность электронных и магнитных полей и распространение в пространстве в виде электромагнитных волн.

Взаимодействие внешних электромагнитных полей с организмом человека осуществляется путем наведения внутренних полей и электротоков, величина распределение которых в теле человека зависит от следующих параметров: размер, форма и анатомическое строение тела.

Электрические и магнитные свойства тканей (проводимость и проницаемость).

Характеристика электромагнитного поля (частота, интенсивность и т.д.)

Воздействие:

1. тепловое вызывается полями большой напряженности – его действие очевидно- Джоулевское тепло. Наиболее чувствительны к облучению органы и ткани, обладающие слабовыраженной терморегуляцией (мощг, глаза, почки).

2.нетепловое – при воздействии электромагнитных полей высоких частот, особенно СВЧ на живой организм имеет место на тепловое воздействие.

Негативное действие выражается в виде торможения рефлексов, изменение биоэлектроактивности головного мозга. Нарушения памяти, развитие синдрома хронической депрессии, понижение давления, замедлении сердечных сокращений, изменение состава крови, нарушение печени и селезенки, помутнение хрусталика глаза, выпадение волос, ломкость ногтей, к электромагнитным полям чувствительна и репродуктивная система.

Существует связь между электромагнитным излучением и онкологической заболеваемостью.

Субъективные критерии отрицательного воздействия Электромагнитных полей – головные боли, повышенная утомляемость, раздражительность, нарушение сна, отдышка, ухудшение зрения, повышение температуры тела.

29. Системы защиты от воздействия ЭМП

1. Уменьшение составляющих напряженностей электрического и магнитного полей в зоне индукции, в зоне излучения – уменьшение плотности потока энергии, если позволяет данной технологический процесс или оборудование.
2. Защиты временем (ограничение времяпребывания в зоне источника ЭМП).
3. Защита расстоянием (60-80 мм от экрана)
4. метод экранирования рабочего места или источника излучения ЭМП.
5. рациональная планировка рабочего места относительно истинного излучения ЭМП
6. применение средств предупредительной сигнализации
7. применение средств индивидуальной защиты.

Дата добавления: 2015-04-24