Archimedes was a famous Greek mathematician and scientist. He was born around 287 BC, and he died in the year 212 BC.
Archimedes is most well known for one specific idea that he came up with. “Archimedes’s Principle” states that a solid object which is immersed in a liquid is pushed up by a force which is equal to the weight of the water that the object displaces (or moves). For example, if you put a piece of wood and a piece of gold the same size in water, only the wood will float. Both the wood and gold displace the same amount of water, but the wood weighs less than this water, while the gold weighs more.
It is believed that Archimedes discovered this principle when the king of Syracuse asked him to solve a problem. The king wanted to know if his crown was pure gold or a mixture of gold and silver. The king, of course, did not want to melt his crown to find out. The idea came to Archimedes as he lowered himself into his bath. He noticed how the water spilled out of the tub. He decided to use the same idea for the crown. He knew that a gold crown immersed in water would weigh more than one made of silver. The experiment was done and the goldsmith was proved guilty of trying to trick the king.
(1). We drop a piece of metal into a jar full of water. The metal will float if it weighs less than __________.(本题1.0分)
A、 an equal amount of gold
B、 the water that leaves the jar
C、 all the water in the jar now
D、 an equal amount of water
学生答案： C
标准答案：B
解析：
得分： 0
(2). The word "immersed" in the 2nd paragraph means ________.(本题1.0分)
A、 very heavy
B、 raise or lift
C、 under water
D、 in water
学生答案： D
标准答案：D
解析：
得分： 1
(3). Archimedes was born about ___________.(本题1.0分)
A、 287 BC
B、 281 BC
C、 212 BC
D、 278 BC
学生答案： C
标准答案：A
解析：
得分： 0
(4). A good title for this selection is ________.(本题1.0分)
A、 Archimedes
B、 Archimedes.s Principle
C、 A Gold and Silver Crown
D、 Archimedes.s Experiment
学生答案： D
标准答案：B
解析：
得分： 0
(5). Archimedes solved a royal problem for the kind of __________.(本题0.0分)
A、 Rome
B、 Greece
C、 Syracuse
D、 England
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