【判断题】两种偏心受压破坏的分界条件为:ξ≦ξb为大偏心受压破坏;ξ﹥ξb为小偏心受压破坏。( )
【单选题】Intra-industry trade takes place:
A.
because products are homogeneous
B.
in order to take advantage of economies of scale
C.
because perfect competition is the prevalent form of market organization
【单选题】表面覆盖是电子产品常用的金属防腐蚀方法下列错误的方法是( )。
【多选题】数字内容加工质量控制的具体流程包括()。
【单选题】在纸质图书数字化加工过程中,扫描图像的保存格式不包括( )
【单选题】Intra-industry trade is most common in the trade patterns of
A.
the industrial countries of Western Europe.
B.
the developing countries of Asia and Africa.
C.
raw material producers.
D.
China with the rest of the world.
E.
labor-intensive products.