“Drilling engineer”的汉语意思为()。
A、平台经理
B、井队技术员
C、钻井工程师
D、场地工
参考答案:C
What ______ the doctors most was that they could not find the cause of the disease.
A.astonished
B.puzzled
C.surprised
D.amused
力是物体间相互的机构作用,这种作用会使物体产生变形,称为力的()。
A、外效应
B、内效应