The grid technique determines the highest-cost location in an area to avoid for movement of materials and goods.
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Labor-intensive industries emphasize a labor climate as a locational determinant.
A. 对
B. 错
The grid technique will evaluate all transportation rates equally.
A. 对
B. 错
在溶胶中加入适量的可溶性高分子后……………………..........………... ( )
A. 可显著的提高溶胶的稳定性
B. 可使高分子化合物失水
C. 可使胶粒表面电荷减少
D. 可使胶粒聚沉
以KI和过量AgNO3为原料制备AgI溶胶,胶核带何种电荷……………( )
A. 正电
B. 负电
C. 不带电性
D. 都有可能