欧冶子是春秋末期到战国初越国铸剑大师，下面哪柄名剑不是出自他手？（）
A.湛卢
B.太阿
C.龙渊
D.轩辕
参考答案：D
Tom never loses heart in face of difficulties,__ ,he always tries his best to overcome them.
A．On the other hand
B．On the contrary
C．At the same time
D．As a result
施工中电缆应采用架空或埋地敷设，当采用埋地敷设时，埋地深度不应小于（）
