直埋电缆与城市道路平行时、其间距不得小于()MM
A.0.7
B.0.5
C.0.3
D.0.1
参考答案:D
The line connecting the Loran-C master station with a secondary station is called the().
A.Focus line
B.Base line
C.Side line
D.Center line
转移性骨肿瘤不常发生的部位是()
A.胸骨
B.额骨
C.颅骨
D.脊柱骨
E.股骨