TEOS is mainly used as a crosslinking agent in silicone polymers and as a precursor to silicon dioxide (SiO2) in the semiconductor industry and is also used as the silica source for the synthesis of some zeolites. When properly hydrolyzed, ethyl silicate produces very fine particles of silica,...
物品i的重量是wi，价值为vi，背包的容量为C(C<=100)。 在装入背包的物品时，对每种物品只有两个选择：装入或不装入。 如何选择装入背包中的物品，使得装入背包中物品的总价值最大?假设有5种物品，背包可以装重量为10的物品，5种物品的重量分别为2,2,6,5,4，价值分别为6,3,5,4,6，输...
High Purity 9n Ethylsilicate Teos for Semiconductor Industry Chat with Supplier High Purity Gas with Cylinder Electronic Grade Trifluoromethane CHF3 Gas Transaction Info PriceUS $ 10.00-30.00/ PieceUS $ 40.00-50.00/ Cubic meterUS $ 40.00-50.00/ Cubic meterUS $...