general knowledge 18

Test # 18

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In a dry cell (battery), which of the following are used as electrolytes? [2009]

Invention : defibrillator
Year : 1952
Inventor : paul m. zoll
Country : us.      .. More >>

1.the first known nerve agent, synthesized by German chemists in 1936
2.a rare silvery (usually trivalent) metallic element
3.a state in southeastern United States      .. More >>

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To win is to be #1 in a competition, or to receive an award.
  • My soccer team won the game 3-1.
  • I want to win the lottery!
  • John won a prize in the science competition.

    You can win a game, a race, a match, a competition, or the lottery. You can also win a medal (like in the Olympics), a prize, or an award.

    To earn something is to get something in exchange for your work or effort, for example: a salary.
  • Sarah is a famous lawyer; she earns a lot of money.
  • I'm not rich, but I earn a decent salary.
  • My bank account earns 2% interest per month.

    To gain something is simply to get or increase - not necessarily because of action:
  • I've gained five pounds since I stopped exercising.
  • Jack's car gained speed as he drove down the mountain.
  • The company is gaining international recognition.

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