问题:高聚物的结晶性越好,生产出的塑料膜透明性越(),对氧气的渗透性越()。高聚物的侧基越大,气体的渗透性越()。
Thursday, February 8, 2024
问题:包装用纸板主要有()、()、()、()、()、()、()。
Friday, June 9, 2023
Saturday, February 24, 2024
Sunday, January 28, 2024
Thursday, February 29, 2024
Saturday, February 24, 2024
Thursday, November 9, 2023
Saturday, November 5, 2022
Tuesday, July 11, 2023
Saturday, April 8, 2023
Sunday, January 28, 2024
问题:玻璃的热膨胀系数越小,热稳定性越(),热稳定性与导热系数的平方根成()。玻璃制品越厚、体积越大,热稳定性也越()。
Friday, April 19, 2024
Thursday, February 8, 2024
Thursday, February 29, 2024
Friday, April 19, 2024
Saturday, October 28, 2023
Tuesday, July 11, 2023
Sunday, January 28, 2024
Sunday, January 28, 2024
问题:线型非晶态聚合物的物理状态主要有(),(),()三种状态。
Saturday, February 24, 2024