题目内容

54. A graduated license is issued to a driver who.

A. is at least a middle school graduate
B. has learned driving at a driving school
C. gains full driving rights step by step
D. has a driving experience long enough

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55. The present situation in about half of the states is that the graduated licensing system .

A. is under discussion
B. is about to be set up
C. has been put into effect
D. has been perfected

金属基底的厚度，非贵金属至少保证（）mm

A. 0.1mm
B. 0.2mm
C. 0.3mm
D. 0.4mm
E. 0.5mm

金―瓷结合部应避免设计在

A. 咬合接触区
B. 非咬合接触区
C. 颊侧
D. 舌侧
E. 颈部

金瓷结合线的伸展位置

A. 颈1/3处
B. 邻面1/3与中1/3交界处。
C. 邻面1/3与中1/2交界处。
D. 舌侧