Long,longagotherewasnozero.Towritethenumbersixty-threep...
问题详情:
Long, long ago there was no zero. To write the number sixty-three people wrote
write six hundred and three, people wrote space between six and three was there
to mean." not any "tens. Sometimes people did not remember the space. It was hard to
see and read. Later people used a dot to hold the space. Six hundred and three looked like this the dot was hard to see. So people put a circle around it like this 6⊙ people
could see the dot. They remembered the space. at last ,only the circle around the dot was used. It was like a zero. This is one story of how the zero came to be used. Now zero has many important uses tells how many. Can you tell some other ways of using zero? ,long ago people didn`t know how to ____. e B write zero e numbers y-three ,longago if they wrote two hundred-eight ,people wrote_____. A.28 B.2 8 C.228 D.208 r ______ was used to mean space. A."not any" er"0" D.a dot le used circles _____________. remember ways remember numbers to forget the space mean nothing story tells us _____. A. how zero came to be used B. how to write zero C. what`s the use of zero D. that zero means a dot, a circle or space
【回答】
B 2、B 3、D 4、C 5、A
知识点:人物传记 故事阅读类
题型:阅读理解
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在探究“光对鼠妇生活的影响”实验中属于变量的是( )A.温度 B.湿度 ...
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