题目内容

One of his daughters became _______ English teacher last August.

A. a
B. an
C. the
D. /

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Lucy is _____11-year-old girl. She is good at playing _____guitar.

A. / ; a
B. an ; /
C. an ; the
D. a ; an

传动轴弯曲或传动轴管凹陷都会引起传动轴动不平衡。

A. 对
B. 错

传动轴一般都做成实心的。

A. 对
B. 错

足底伤疤基本形态有_______斑块状伤疤两种。

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