curiousobservationthatsomecallthe “radiation effect”.“Radiationeffectisasituationwherechildrengrowuparoundbooks,buttheydon?tread books.Butsomehow books benefitthem,even thoughtheydon?treadthemasmuchastheirparentswishthemto,”saidJoannaSikora,asociologistinAustralia.Joannaandhercolleaguesanalyzeddatacollectedbetween201...
The extra amount of ultraviolet radiation could cause an increase in the number of cases of skin cancer. Scientists first became concerned about the ozone layer in the mid-1980s when a hole was discovered in the layer above Antarctica during the winter. The hole was caused by chemicals used ...
The extra amount of ultraviolet radiation could cause an increase in the number of cases of skin cancer. Scientists first became concerned about the ozone layer in the mid-1980s when a hole was discovered in the layer above Antarctica during the winter. The hole was caused by chemicals used ...
T he sun's summertime rays are more dangerous than once thought.A team of scientists from 80 nations recentlyreported to the United Nations that a layer ofozone(臭氧层)in the atmosphere, which protects humans from harmful levels of ultraviolet紫外线)radiation, will be thinner over the United ...
the figure of 60 rems has been agreed on. The trouble is that it is extremely difficult to be sure about radiation damage a person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered until the birth of deformed(畸形的) child...
中小学最新教育资料 1.My father bought the car in 2016.(改为被动语态) The car __was__ __bought__ by my father in 2016. 2.Penicillin (青霉素) was discovered by Alexander Fleming.(改为一般疑问句) __Was__ Penicillin __discovered__ by Alexander Fleming? 3.The books were written by Mr...
13. The harm radiation has done to the apollo crew members A is insignificant B seems overestimated C is enormous D remains unknown 14. It can be inferred from the passage that A. the Apollo mission was very successful B protection from space radiation is no easy job C astronauts will have...
根据文中语句About 300 years ago, London was starting to get bigger and more and more people began to live there.可知,在大约300年前,伦敦变得越来越大,越来越多的人来到伦敦居住。故选D。 (3)细节理解题。根据文中语句There were so many thieves who stole money in the streets that people stayed...
Kidney stones alone aren't generally dangerous. However, if you don't pass your stones, you may get complications, such as UTIs or kidney infections, that can be dangerous. They can also be extremely painful. If you think you may have kidney stones, you should go see your doctor. They ...
Scientists first became concerned about the layer in the mid-1980s when a hole was discovered in the layer above Antarctica during the winter.The hole was caused in chemicals used in refrigerators and air conditioners.When these chemicals are sent out into the atmosphere, they produce gases that...