In its pure State, aluminum is a weak metal, but when combined with elements such as copper or magnesium, it is formed alloys of great strength.

Câu hỏi liên quan

• From 1905 to 1920, American novelist Edith Wharton was at the height of her writing career, publishing of her three most famous novels.

• Choose the correct answer to complete the sentence. "Planting trees can contribute to _____ global warming"

• When T.S. Eliot’s “The Wasteland” appeared in 1922, critics were divided as to how good it was written

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• Mosquitoes will accepts the malaria parasite at only one stage of the parasite’s complex life cycle.

• The factory was fined for ...... chemicals into the river.

• Consequently the kit fox is an endangered species, wildlife experts in the California desert are using carious methods to protect it.

• In the early twentieth century, there was considerable interesting  among sociologists in the fact that in the United States the family was losing its traditional roles.

• Only averaged about 5 feet above sea level, the Marshall Islands would disappear under the Pacific should the Arctic icepack melt.

• The film is boring, _    ?

• When you passed the town hall clock, did you notice what time was it

• Rita plays .......... violin and her sister plays .......... guitar. 

• One of the four underlined parts marked A, B, C, D in each sentence is not correct in standard English. Identify them: 

  If I had known he is not at home, I wouldn’t have gone all the way to his house. 

• They usually took a tree back with them and put it on the centre of the village

• Mosquitoes are such fast breeders that it is almost impossible to control them either by draining areas where they breed or to spary them with pesticides

• While searching for the wreckage of a unidentified aircraft, the Coast Guard encountered severe squalls at sea.

• Choose the correct answer to complete the sentence. "In the first case, the dried material is scraped off the roller as a thin film _____ is then broken up into small, though still relatively coarse flakes."

• The students in the dormitories were forbidden from going out after 11:30 p.m., unless they have special passes.

• In England as early as the twelfth century, young boys enjoyed to play football.

• The homes created by the legendary architect Frank Lloyd Wright are still viewed as uniquely innovative, and valuable.

• A seismograph oscillation of the ground caused by seismic waves, vibrations that travel from its point of origin through the Earth or along its surface.