题目内容

在固定板零件两侧侧壁的加工中选用了φ16mm的高速钢立铣刀，如果换成φ18mm的高速钢立铣刀也可以加工，而且效率会更高。

A. 对
B. 错

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在固定板零件两侧侧壁的加工中选用了φ16mm的高速钢立铣刀，加工中每次铣削侧壁的深度是0.2mm，主轴的转速是800转/分钟，进给速度是150mm/分钟。

A. 对
B. 错

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The expression "keep a stiff upper lip", refers to a trait that the British value highly, A stiff upper lip means

A. avoid insulting other people
B. death begins in the mouth
C. face the troubles of life with calmness
D. people who tell lies reveal it in their shaking lips

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The earliest known inhabitants of the British Isles were the

Anglo-Saxons
B. Celtics
C. Romans
D. Normans

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Hadian's Wall was built by

A. The Scottish
B. The English
C. The Celtics
D. The Romans

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在固定板零件两侧侧壁的加工中选用了φ16mm的高速钢立铣刀，如果换成φ18mm的高速钢立铣刀也可以加工，而且效率会更高。

A. 对 B. 错

在固定板零件两侧侧壁的加工中选用了φ16mm的高速钢立铣刀，加工中每次铣削侧壁的深度是0.2mm，主轴的转速是800转/分钟，进给速度是150mm/分钟。

The expression "keep a stiff upper lip", refers to a trait that the British value highly, A stiff upper lip means

The earliest known inhabitants of the British Isles were the

Hadian's Wall was built by

A. 对
B. 错