Tuesday, April 29, 2025
Thursday, March 6, 2025
问题:单死结的横向强度大于纵向强度,故大多数采用纵目装配使用。...
Friday, August 1, 2025
Thursday, March 6, 2025
问题:某纤维材料,其燃烧时迅速卷缩并熔化,不燃烧,黑烟熔化成碎裂黑物质,热熔物不能拉长,纤维燃烧端硬、黑、易碎,不规则,无熔珠,则该纤维是()。A、PVAB、PESC、PED、PVC...
Friday, November 8, 2024
Saturday, June 1, 2024
问题:围网按鱼类栖息水层分()、()、灯光围网等三类。...
Wednesday, June 4, 2025
问题:单死结的横向强度大于纵向强度,故大多数采用纵目装配使用。...
Friday, August 1, 2025
问题:网片的减目方法有并()、()、宕眼减目法等三种。...
Tuesday, April 29, 2025
Wednesday, June 4, 2025
问题:渔具分类依据是渔具特征它包括渔具材料、()、()、作业方式。...
Friday, August 1, 2025
Saturday, April 19, 2025
Friday, August 1, 2025
Friday, August 1, 2025
Friday, August 1, 2025
Thursday, March 6, 2025
Friday, August 1, 2025
问题:笼壶类渔具按结构分()、()两大类,按作业方式分有()、定置延绳式、散布式三类。...
Friday, August 1, 2025
Friday, June 6, 2025
问题:超声波遇泥砂底时记录线有两种色彩,上淡下浓;超声波遇浮游生物时记录是很薄的();超声波遇跃温层时记录有一()而出现一层弱带状记录(此记录稳定)。...
Monday, July 8, 2024