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【多选题】
下列等价式中错误的是A.
( $ x)( A(x) → B(x) ) Û " x A(x) → $ x B(x)
B.
( $ x)A(x) →p Û ( $ x)(A(x) → p )
C.
( " x)(A(x) Ù B(x)) Û ( " x)A(x) Ù ( " x)B(x)
D.
( " x)(A(x) Ú B(x)) Û ( " x)A(x) Ú ( " x)B(x)
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【简答题】有一外圆锥，最大直径为200mm，圆锥长度为400mm，圆锥直径公差等级为TT8级，求直径公差所能限定的最大圆锥角误差。
【简答题】有一外圆锥，最大直径为200mm，圆锥长度为400mm，圆锥直径公差等级为IT8级，求直径公差所能限定的最大圆锥角误差。
【单选题】The last paragraph is intended to______.
A.
tell people how to cope with road rage
B.
inform. people how aggressive drivers could be
C.
tell people how to control themselves when angry
D.
warn people against eye contact with another driver
【简答题】You want to know about my staying in America, right? Well, to tell you the truth, it is really an eye-opening experience study here. In China, I had English classes five times a week since fifth grade...
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