当蜗轮或蜗杆齿面磨损超过原齿厚的()时，应更换
A. 10%
B. 20%
C. 30%
D. 40%
______youve found, you must give it back to the owner.
A. Whichever
B. What
C. Whatever
D. Which
His friends______him of having broken his words.
A. denounced
B. complained
C. accused
D. charged
按照孔、轴的配合情况，当轴的公差带在孔的公差带之下时属于()
A. 间隙配合
B. 过盈配合
C. 过渡配合
D. 普通配合
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