皮皮学，免费搜题
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搜题
【单选题】
What did the author feel surprised when he began to play eSports?A.
high speed with which people can control their hands while at the same time keeping such a high level of critical thinking
B.
run faster than a train while driving a minivan
C.
solve a math equation while driving a minivan
D.
evaluate certain situations and keep cool under pressure
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】单向铣刀铣削齿背由折线组成的刀具时,可用( )。
A.
一把铣刀铣槽一次成形
B.
一把铣刀铣出槽后,再铣齿背成形
C.
一把圆柱螺旋铣刀铣削成形
D.
直齿三面刃铣刀铣削成形