旋转阳极X线管与固定阳极管比,优点是
A、焦点大,功率小B
暂无解析
Wewillconsider______yourtermsofpayment.
YourfirmhasbeenrecommendedtousbytheJamesOlivier&Co.____wehavedonebusinessformanyyears
Weconfirm_______yourorderNo.7891datedMay10,1990.
EveryoneknowsthatChina’sBristlesareofsuperiorquality______thosefromothercountries.
Thisisthefirsttimethatawomanhasbeen________tothepost.