患者,女,40岁。下颌第一磨牙近中面大面积银汞合金充填,近中食物嵌塞,余牙正常,要求治疗。如果此牙为死髓牙,牙根长大,根管治疗完善,牙槽骨高度基本正常。则最佳的治疗方案为()
A. 烤瓷冠修复
B. 铸造桩核+全冠修复
C. 银汞充填+全冠修复
D. 嵌体修复
E. 3/4冠修复
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A system administrator has created tty2 on a serial port connection to a system. When attempting to verify the connection the following error is observed: # cu -ml tty2 cu: 0835-028 The connection failed. NO DEVICES AVAILABLE. Which of the following should be performed to correct this error?()
A. Create an entry for tty2 in the /etc/uucp/Devices file
B. Re-enter the command as "cu -dml tty2"
Create an entry for tty2 in the /etc/uucp/Systems file
D. Re-enter the command as "cu -s 9600 -dh -t -l tty2"