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阅读下面短文，从每题所给的四个选项中选出最佳答案.
It is only a shiny, yellow metal, but it is one of the most valuable on earth. Since the beginning of time, men have looked for this extremely valuable item, gold.
Gold is soft and easy to form into different objects. If it gets wet, it does not rust like iron or other metals. Acids (酸) do not change it. One important reason that gold is so valuable is that it is scarce, because of its softness, gold must be combined with other metals to harden it and give it strength. By hardening gold, people can then make coins and jewelry with it. Metals commonly mixed with gold are nickel (镍), platinum (铂), and copper. Gold jewelry bears (刻有) a number and the letter K. The K means karat (carat), which is a measure of the amount of pure gold in the jewelry. Pure gold is 24K. Therefore, a necklace which is 14K is fourteen parts gold and ten parts other metals.
Many countries make use of gold for certain coins, but this practice is not as common now as it once was. The United States, for instance, stopped making gold coins in 1933.
(1)Which of the following would be the best title for this passage?
[ ]
A．Valuable Metal
B．Looking for Gold
C．Jewelry and Coins
D．What is Karat?
(2)Which is NOT the reason why gold is highly valuable?
[ ]
A．It can be made into jewelry
B．It is not easily found
C．It is soft and shiny
D．It does not rust when wet
(3)In order to make it stronger, gold is often mixed with ________.
[ ]
(4)If a ring is marked 12K, then the percentage of gold in it is ________.
[ ]
(5)Gold may be correctly described by the following EXCEPT ________.
[ ]
阅读下面短文，从每题所给的四个选项中选出最佳答案.
It is only a shiny, yellow metal, but it is one of the most valuable on earth. Since the beginning of time, men have looked for this extremely valuable item, gold.
Gold is soft and easy to form into different objects. If it gets wet, it does not rust like iron or other metals. Acids (酸) do not change it. One important reason that gold is so valuable is that it is scarce, because of its softness, gold must be combined with other metals to harden it and give it strength. By hardening gold, people can then make coins and jewelry with it. Metals commonly mixed with gold are nickel (镍), platinum (铂), and copper. Gold jewelry bears (刻有) a number and the letter K. The K means karat (carat), which is a measure of the amount of pure gold in the jewelry. Pure gold is 24K. Therefore, a necklace which is 14K is fourteen parts gold and ten parts other metals.
Many countries make use of gold for certain coins, but this practice is not as common now as it once was. The United States, for instance, stopped making gold coins in 1933.
(1)Which of the following would be the best title for this passage?
[ ]
A．Valuable Metal
B．Looking for Gold
C．Jewelry and Coins
D．What is Karat?
(2)Which is NOT the reason why gold is highly valuable?
[ ]
A．It can be made into jewelry
B．It is not easily found
C．It is soft and shiny
D．It does not rust when wet
(3)In order to make it stronger, gold is often mixed with ________.
[ ]
(4)If a ring is marked 12K, then the percentage of gold in it is ________.
[ ]
(5)Gold may be correctly described by the following EXCEPT ________.
[ ]
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