单项选择题

Traveling is _ , but we usually feel _ when we are back home from travel.

A.interesting,tired
B.interested,tiring
C.interesting,tiring
D.interested,tired

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一般而言，()生产过程方案的固定费用最高。

A.对象式
B.产品原则布置
C.工艺专业化
D.批量生产
E.以上都是

单项选择题

___ that they may gradually reduce the amount of labor by 90 percent.

A.So
B.So
C.Such
D.Such