新核心3 Unit2 答案

更新时间:2023-06-28 23:45:44 阅读：评论：0

Unit 2

Nuclear Radiation

P32

Approaching the Topic

Task 2

Date	Location 订报	Description	Deaths	I-131 Relea in 1,000Ci	Cost (in million $US)	INES level
Jan. 3, 1961	Idaho Falls, Idaho, US	Explosion at SL-1, National Reactor Testing Station. All 3 operators killed when rod was removed too far causing a critical surge and steam explosion. An additional 1,100 Curies were relead as fission products to the atmosphere, but due to the remoteness, most of it was recovered and buried. 应征公民体检标准	3	0.08	22	4
Mar. 28, 1979	Middletown, Pennsylvania, US	Loss of coolant and partial core meltdown.	0	0.017	2,400	5
Apr. 26, 1986 吃了精子会怀孕吗	Pripyat, Ukraine	Steam explosion and meltdown necessitating the evacuation of 300,000 people from Kiev and dispersing radioactive material across Europe.	53	7,000	6,700	7
Sep. 30, 1999	Ibaraki Prefecture, Japan	Workers at the Tokaimura uranium processing facility added too many buckets of uranium directly into a precipitation tank, causing it to go critical, killing two, and exposing one more to radiation levels above permissible limits.	2		54	4
Aug. 9, 2004	Fukui Prefecture, Japan	Steam explosion at Mihama Nuclear Power Plant killed 4 workers and injured ven more.	4		9	1
Mar. 11, 2011	Ōkuma, Fukushima, Japan 利用我	Cooling failure in 4 reactors following an earthquake, tsunami and multiple fires at the Fukushima I Nuclear Power Plant. 2 workers died due to the tsunami and another (in his 60s) succumbed during clean-up work, possibly due to heart failure or exhaustion, as no significant radiation was found on his person.	3	2,400		追星的好处 7 (provisional)

Task 3

1) Higher-than-standard levels of radiation were detected in their products.

2) Spinach and other green-leaf vegetables.

3) They have been returned to the farmers.

P39

Main Reading

Task 1

Nouns: 1.l 2.n 3.a 4.k 5.h 6.j 7.i 8.m 9.e 10.b 11.f 12.g 13.c 14.d 15.o

Adjectives: 1.k 2.o 3.i 4.l 5.j 6.m 7.n 8.g 9.b 10.e 11.a 12.d 13.c 14.f 15.h

Verbs: 1.g 2.d 3.h 4.b 5.f 6.e 7.a 8.c

Adverbs: 1.f 2.d 3.g 4.b 5.e 6.h 7.a 8.c

Phras: 1.c 2.d 3.f 4.a 5.b 6.g 7.e

Task 2

1) Radiation is all around. It comes from outer space (cosmic), the ground (terrestrial), and even from within human bodies. It is prent in the air, food, water, and in the construction materials ud to build homes. Man-made radiation also comes from medical, commercial, and industrial activities.

2) Levels of natural or background radiation can vary greatly from one location to the next.

3) Biological effects of radiation on living cells may result in three outcomes: (1) injured or damaged cells that repair themlves, resulting in no residual damage; (2) cells killed, jus

t as millions of body cells die every day, being replaced through normal biological process; or (3) cells that incorrectly repair themlves resulting in a biophysical change.

4) Although radiation may cau cancers at high dos and high do rates, currently there are no data to establish unequivocally the occurrence of cancer following exposure to low dos and do rates.

5) Becau radiation affects different people in different ways, it is not possible to indicate what do is needed to be fatal. However, it is believed that 50% of a population would die within thirty days after receiving a do of between 350,000 to 500,000 mrem (3500 to 5000 mSv) to the whole body, over a period ranging from a few minutes to a few hours. This would vary depending on the health of the individuals before the exposure and the medical care received after the exposure.

6) The likelihood of cancer occurring after radiation exposure is about five times greater than a genetic effect.

7) No. It is naturally prent in the environment. Consumer products such as tobacco, fertilizer, welding rods, exit signs, luminous watch dials, and smoke detectors contribute about another 10 mrem to people’s annual radiation exposure.

Radiation is all around. It comes from outer space (cosmic), the ground (terrestrial), and even from within human bodies. It is prent in the air, food, water, and in the construction materials ud to build homes. Man-made radiation also comes from medical, commercial and industrial activities. Levels of natural or background radiation can vary greatly from one location to the next. Biological effects of radiation on living cells may result in three outcomes: (1) injured or damaged cells that repair themlves, resulting in no residual damage; (2) cells killed, just as millions of body cells die every day, being replaced through normal biological process; or (3) cells that incorrectly repair themlves resulting in a biophysical change. Although radiation may cau cancers at high dos and high do rates, currently there are no data to establish unequ

ivocally the occurrence of cancer following exposure to low dos and do rates. Becau radiation affects different people in different ways, it is not possible to indicate what do is needed to be fatal. However, it is believed that 50% of a population would die within thirty days after receiving a do of between 350,000 to 500,000 mrem (3500 to 5000 mSv) to the whole body, over a period ranging from a few minutes to a few hours. This would vary depending on the health of the individuals before the exposure and the medical care received after the exposure. The likelihood of cancer occurring after radiation exposure is about five times greater than a genetic effect. Radiation is naturally prent in the environment. Consumer products such as tobacco, fertilizer, welding rods, exit signs, luminous watch dials, and smoke detectors contribute about another 10 mrem to people’s annual radiation exposure. Therefore, it is not necessary to fear all kinds of radiation.

小孩辅食做法大全

Types of Radiation	Origins	Effects on People
Natural or background radiation	Food: bananas, brazil nuts	low levels of radiation exposure: the biological effects are so small they may not be detected.
	Building materials: brick, stones
	Cosmic: high altitude residence
Man-made radiation	Medical activities: CT scans	low levels of radiation exposure: the biological effects are so small they may not be detected.
	Commercial activities: exit signs, smoke detectors
	Industrial activities: tobacco, fertilizer, welding rods, luminous watch dials
Aperitif

P46