题目内容

Theproductionline____ismoreconvenientforus.

A. manual
B. half-automated
C. fullyautomated

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Iwonderifitisconvenienttomeetyounextweek，please____aspecifictimeforourfactorytouring.

A. fix
B. set
C. repair
D. prepare

Ibelievethisfactorytouringwilldeepenmutualunderstandingand____ourcooperation.

A. increase
B. improve
C. enrich
D. promote

请叙述构造哈夫曼树的步骤。

绘制工程图底稿时，画细实线和各类点划线时，宜采用（）铅笔。

A. H或2H
B. 2B
C. 3B
D. 4B