Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.Many efforts are made by the WWF organisation in the hope of preserving species and maintaining the _______ balance.A.ecologistB.ecologicalC.ecologicallyD.ecology
Liên kết trong phân tử HI là liên kết (Biết độ âm điện của I và H lần lượt là 2,66 và 2,2):A.cộng hóa trị có cựcB.đôi.C.ion.D.cộng hóa trị không phân cực.
Để đánh giá loại liên kết trong phân tử hợp chất, người ta có thể dựa vào hiệu độ âm điện. Khi hiệu độ âm điện của hai nguyên tử tham gia liên kết nhỏ hơn 0,4 thì đó là liên kếtA.cộng hoá trị có cực.B.kim loại.C.cộng hoá trị không cực.D.ion.
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.Darwin’s theory of __________has helped to explain the disappearance of some species and the survival of others.A.innovationB.developmentC.evolutionD.improvement
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.Dinosaurs and mammoths are classified as EX, meaning extinct, on the _________ status scale.A.conservationB.conversationC.protectionD.preservation
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.Programs to raise public _____ about protecting wild and endangered animals have been conducted.A.recognitionB.careC.attentionD.awareness
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.Climate scientists have measured the temperature and________on every part of the Earth over many years.A.rain levelB.rainfallC.fall in rainD.level of rain
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.Many people think the money spent on protecting ___________ species should be used for improving the lives of the local residents.A.endangerB.dangerousC.dangerD.endangered
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.I don’t have chance to see a lot of ______animals because I live in a big city.A.wildlifeB.speciesC.mammalsD.insects
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.Many nations have laws offering protection to these species, such as forbidding hunting, restricting land development or creating _______. A.agenciesB.challengesC.awarenessD.reserves
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