Ozone is an unstable faintly bluish gas that is the most chemical active form of Oxygen.

Câu hỏi liên quan

• Carnegie hall was the first building in New York designed special for orchestral music.

• No one is in this room now, _    ? 

• By the end of the month, I’ll be working for this firm for a year.

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• Are there enough champagne to go round ? Will everybody get a glass?

• The vase has the same design, but it is different shaped from that one.

• Choose the best option:

  She is a famous ___. She tries her best to protect rare animals from extinction.

• Karen hasn’t decided still if she wants to run for the Presidency again this year.

• Choose the correct answer to complete the sentence. "Such unhygienic conditions encourage the ______ diseases"

• People with exceptionally high intelligence quotients may not be the best employees since they become bored of their work unless the job is constantly changing

• Sue works as .................. teacher in ...................school for .................. blind in Ireland. ........school has over a thousandpupils. 

• A nation's balance of trade is considered unfavorable if it ______________ more money on imports that it gains from exports. 

• If it is kept dry, a seed can still sprout up to forty years after their formation

• Choose the correct answer to complete the sentence. "Scientists predict that by 2030, the rainforest will have ______ smaller by 40%. "

• The orangutan’s hands and feet arc designed for holding and grasping branches, dud its powerful immensely arms enable it to climb and swing in trees without difficulty.

• A fragrant plant has tiny sacs that makes and stores the substances that give it a pleasant odor.

• The most of the energy used in our homes and factories is generated from coal, oil and natural gas

• All the students are looking forward spending their free time relaxing in the sun this summer.

• The function of pain is to warn the individual of danger, so he can take action to avoid more serious damage.

• The environment can be defined as all living and nonliving items in an area at a specify time.

• Choose the correct answer to complete the sentence. "He was admired for _____ donated a lot of money to environmental protection campaigns"