题目内容

厨刀按用途划分有：批（片）刀、切刀、斩刀、（）等。

A. 肉刀
B. 菜刀
C. 不锈钢刀
D. 前批后斩刀

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If over a period of time, the oi1 film partially disappears, so that dry areas are formed on the cylinder wall, these areas and the piston surfaces will by frictional interaction, become finely scuffed and hardened, iegood mirror surface" will have deterioratedWhat condition of the piston rings can result in this phenomenon?（）

A. micro-seizure
B. sticking
C. scratched
D. breakage/collapse

通信铁塔机房顶部的各种金属设施，均应分别与屋顶（）就近连通。

中外合作者的投资或者提供的合作条件只限于现金、实物、土地使用权和工业产权。（）

A. 正确
B. 错误