Đề KS chuyên đề lần 1 môn tiếng Anh lớp 12 năm 2018-2019 - THPT Tam Dương - Mã đề 485

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Đề KS chuyên đề lần 1 môn tiếng Anh lớp 12 năm 2018-2019 - THPT Tam Dương - Mã đề 485SỞ GD & ĐT VĨNH PHÚCTRƯỜNG THPT TAM DƯƠNGĐỀ KHẢO SÁT CHUYÊN ĐỀ LẦN 1MÔN: TIẾNG ANH 12Thời gian làm bài: 60phút;(50 câu trắc nghiệm)Mã đề thi485(Học sinh không được sử dụng tài liệu)Họ, tên học sinh:.....................................................................SBD: .............................Read the following passage, and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect answer to each of the questions from 1 to 8.An air pollutant is defined as a compound added directly or indirectly by humans to the atmosphere in suchquantities as to affect humans, animals, vegetation, or materials adversely. Air pollution requires a very flexibledefinition that permits continuous change. When the first air pollution laws were established in England in thefourteenth century, air pollutants were limited to compounds that could be seen or smelled - a far cry from theextensive list of harmful substances known today. As technology has developed and knowledge of the healthaspects of various chemicals has increased, the list of air pollutants has lengthened. In the future, even water vapormight be considered an air pollutant under certain conditions.Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and nitrogen oxides, arefound in nature. As the Earth developed, the concentration of these pollutants was altered by various chemicalreactions; they became components in biogeochemical cycles. These serve as an air purification scheme byallowing the compounds dwarfs that resulting from human activities.However, human production usually occurs in a localized area, such as a city. In such a region, human outputmay be dominant and may temporarily overload the natural purification scheme of the cycles. The result is anincreased concentration of noxious chemicals in the air. The concentrations at which the adverse effects appear willbe greater than the concentrations that the pollutants would have in the absence of human activities. The actualconcentration need not be large for a substance to be a pollutant; in fact, the numerical value tells us little until weknow how much of an increase this represents over the concentration that would occur naturally in the area. Forexample, sulfur dioxide has detectable health effects at 0.08 parts per million (ppm), which is about 400 times itsnatural level. Carbon monoxide, however, has a natural level of 0.1 ppm and is not usually a pollutant until its levelreaches about 15 ppm.Câu 1: What does the passage mainly discuss?A. The effects of compounds added to the atmosphere. B. What constitutes an air pollutant?C. The economic impact of air pollution.D. How much harm air pollutants can cause.Câu 2: The word “adversely” in the first paragraph is closest in meaning to_________.A. quicklyB. considerablyC. admittedlyD. negativelyCâu 3: According to the passage, human-generated air pollution in localized regions________.A. can be dwarfed by natures output of pollutantsB. can overwhelm the natural system that removes pollutantsC. will damage areas outside of the localized regionsD. will react harmfully with natural pollutantsCâu 4: The word “These” in the second paragraph is closest in meaning to________.A. the components in biogeochemical cyclesB. the compounds moved to the water or soilC. the pollutants from the developing EarthD. the various chemical reactionsCâu 5: It can be inferred from the first paragraph that__________.A. a substance becomes an air pollutant only in citiesB. the definition of air pollution will continue to changeC. most air pollutants today can be seen or smelledD. water vapor is an air pollutant in localized areasCâu 6: According to the passage, the numerical value of the concentration level of a substance is onlyuseful if___________.A. the other substances in the area are knownB. it is in a localized areaC. the natural level is also knownD. it can be calculated quicklyCâu 7: The word “detectable” in the third paragraph is closest in meaning to_______.A. measurableB. specialC. separableD. beneficialTrang 1/4 - Mã đề thi 485Câu 8: For which of the following reasons can natural pollutants play an important role in controlling airpollution?A. They function as part of a purification process.B. They occur in greater quantities than other pollutants.C. They are less harmful to living beings than other pollutants.D. They have existed since the Earth developed.Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part ispronounced differently from others from 9 to 10.Câu 9:A. educateB. ancientC. strangerD. transferCâu 10: A. buryB. carryC. manyD. heavyMark the letter A, B, C or D on your answer sheet to indicate the word that differs from the rest in theposition of the main str ...