FamousInventionsandTheirInventors X-rayswerediscovere...
问题详情：FamousInventionsandTheirInventors X-rayswerediscoveredin1895byaGermanprofessor,WilhelmRoentgen.Peopleallovertheworldwereamazedbyhisinvention,theX-raymachine.Thisinventionwassoimportanttha...