简述公平课税论的基本思想。

―My chance will come soon.

―       .

A．Every dog has its day.

B．A good medicine tastes bitter

C．A good name is easier lost than won

D．Blind men can judge no colors

I have got _____beef for lunch, but I haven’t got ______tomatoes.

A．any; some

B．some; any　

C．any; any

D．some; some

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日本人忌讳什么数字，认为它意味着倒霉和不幸？

气缸的研磨采用的是（）。

A.平面研磨

B.曲面研磨

C.圆锥面研磨

D.圆柱面研磨