Gunpowder, in some ways the most effective of all the explosive materials, were a mixture of potas nitrate, charcoal, and sulfur.

Câu hỏi liên quan

• My English this term is  .......   than that of last year.

• The football match was televised lively from National stadium

• Choose the letter A, B, C or D to complete the sentences. " _____ more help, I could call my neighbour."

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• He said  “Good morning ” in a most friendli way.

• There are no pouched animals in the United States but only Opossum.

• Drug abe have become one of America’s the most serious social problems.

• Choose the correct answer to complete the sentence. "_____ been living with his cousin for two months, but he's looking to a place close to his university"

• Choose the correct answer to each of the following questions. "Though built almost five hundred years ago, the church remained practically______."

• Both a term paper and final exam is often required for a college clas

• The graphics abilities of a computer depend on the speed of its processor and the size of its RAM.

• This doesn’t need no more wax; there’s plenty already .

• I’m trying to save up for a trip to Canada, so I can’t afford buying much now.

• Choose the correct answer to complete the sentence. "All students are _____ to take part in providing education for children in remote and mountainous areas"

• “How does the human brain work?” remains one of the profound questions confront modern Science.

• Before dinosaurs became xtinct, plant life is very different on Earth.

• When her son, Nick fell and injured his knee, she refused to pay for doctor and spent hours looking up free medical help.

• Included the series are “ Enchanted Horses”, among other famous children’s stories

• Rice, which it still forms the staple diet of much of the world’s population, grows best hot, wet land.

• Many animal species are totally colors blind, but the condition s very rare humans.

• 1971 U.S government policy not only put warnings on cigarette packs but also ban television advertising of cigarettes.