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2.

A. He has recited enough words and expressions, but he doesn't know how to get started.
B. He has read a lot, but he doesn't know how to recite the new words and expressions.
C. He doesn't know what to write and how to write.
D. He can not understand what the professor taught him.

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3.

A. He taught him some shortcuts to improve writing rapidly.
B. He showed him methods on how to recite new words and expressions.
C. He taught the student how to write an outline.
D. He told the student to read more and write more.

国标规定图纸的基本幅面是

A. 4种
B. 5种
C. 6种
D. 7种

单选:标题栏一般位于图纸的( )。

A. 左上角
B. 右下角
C. 左下角
D. 右上角

点画线在图中可表示

A. 可见轮廓线
B. 不可见轮廓线
C. 轴线和对称线
D. 假想投影轮廓线

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