单项选择题
A single heavy wire made up for the topping lift is called a（）.
A.Bale B.Spanner wire C.Bull line D.Working guy
单项选择题 A device used to enlarge the size of an existing bore hole，having teeth arranged on its outside circumference to cut the formation as it rotates is a（n）（）.
单项选择题 A “figure eight” knot is used to（）.
单项选择题 “15 02 41 Semi Double Queen 195 332mm”is a description of（）.
