单工位组合机床在工件一次安装中不能完成钻、扩、绞孔加工。( )
参考答案：错
肺结核咯血的最常见原因为（）。
A.病灶钙化
B.病灶形成纤维化
C.渗出和空洞病变
D.病灶出现硬结
E.血小板减少
Diana bought a stereo for $530, which was the retail price plus a 6 percent sales tax. How much money could she have saved if she had bought the stereo at the same retail price in a neighboring state where she would have paid a sales tax of 5 percent ？（）
A．$1.00
B．$2.65
C．$4.30
D．$5.00
E．$5.30
