金属烤瓷冠切端牙体磨除厚度一般为
A.0.5mm B.1.0mm C.1.5mm D.2.0mm E.3mm
参考答案:D
集装箱装箱单有()联。
A.4
B.5
C.6
D.7
Which method should be used to secure a manila line to bitts().
A.A round turn on the bitt farthest from the strain and then figure eights
B.A round turn on the bitt closest to the strain and then figure eights
C.Figure eights and then a round turn at the top of both bitts
D.Only figure eights are necessary on both bitts