A.12.7
B.18.7
C.15.9
D.31.8
[单选题]A.12.7B.18.7C.15.9D.31.8
[单选题]A.12.7B.18.7C.15.9D.31.8
[单选题]A.12.7B.18.7C.15.9D.31.8
[单选题]A.12.7B.18.7C.15.9D.31.8
[单选题]A.12.7B.18.7C.15.9D.31.8
[单选题]A.12.7B.18.7C.15.9D.31.8
[单选题]A.12.7B.18.7C.15.9D.31.8
[单选题]A.3.5B.3C.2.5D.2E.1.5
[单选题]A.3.5B.3C.2.5D.2E.1.5
[单选题]A.刀刃置于袋底根面上B.刀刃与根面成45度左右C.刀刃与根面成85度D.刀柄紧靠牙冠E.要有两点接触