当工程量的变化直接造成该项工作单位成本的变动超过()时,宜对有关工作内容采用新的费率或价格。
A.0.01%
B.0.10%
C.1%
D.10%
参考答案:C
None of the assistants were _____ when the professor needed some help. [ ]
A. available
B. accessible
C. inevitable
D. appropriate
拉拔法拆卸用于锥销的拉拔、轴端的滚动轴承、齿轮等的拉卸。