目前所使用的CD-ROM光驱大多为（）接口，它可以直接与主机相连。
A.SCSI
B.PS/2
C.C.E-IDE
D.IEEE1394
参考答案：C
The nurse uses 30 mL of solution to irrigate a nasogastric tube and notes that 20 mL returns promptly into the drainage container. When the nurse records the results of the irrigation, how much solution should be recorded as intake
A．10mL.
B．20mL.
C．30mL.
D．50mL.
錾削硬钢或铸铁等硬材料时，楔角取（）。
A.50°～60°
B.60°～70°
C.30°～50°
D.10°～30°
