问题
解答题
圆和半圆都有无数条对称轴．______．
答案
圆的对称轴有无数条，分别是经过圆心的直线；
半圆只有一条对称轴，是经过圆心，且垂直于半圆直径的直线；
所以原题说法错误．
故答案为：错误．
搜题请搜索小程序“爱下问搜题”
圆和半圆都有无数条对称轴．______．
圆的对称轴有无数条，分别是经过圆心的直线；
半圆只有一条对称轴，是经过圆心，且垂直于半圆直径的直线；
所以原题说法错误．
故答案为：错误．
We have no idea about 1 men first began to use salt. But we do know that it had been used in many different ways __2___ the history. For example, in many history books it is __3__ that people who lived three thousand years ago __4__salted fish. Thousands of years ago in Egypt（埃及）, salt __5_ keep the dead. It can keep the dead bodies __6__ decay.（腐烂） In the eighteenth century, a person who stole salt was __7__ to have broken the __8__. if a person was caught stealing salt, he would be thrown into __9__. Books also record that in England about ten thousand people were put into prison during that century _10__ stealing salt! In the year 1553, if a man took __11__ than his share of salt, he would be thought to have broken the law and would be __12__ punished(惩罚). Salt was very __13__ on the dinner table of a king. It was always put __14__ the king when he sat down to eat. Then important visitors sat near the salt __15_ less important visitors were given seats farther away from it.
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