对于制得的CTMP,在H2O2用量一定时,磺化PH=()时,漂白浆白度最高 ["A、6.0","B、7.5","C、8.5","D、10.0"]
线圈的感抗是阻抗最重要的分量之一,它(). ["决定于频率、线圈电感、线圈电阻","仅仅决定于线圈电感","仅仅决定于频率和线圈电阻","仅仅决定于频率和线圈电感"]
当船舶上行驶经弯曲河段时,如遇有沙齿,应(). ["A、提高警惕","B、保持足够的岸距","C、随时注意船首动态","D、以上都对"]
盘磨机磨浆适宜的预热温度应在()度范围 ["A、120—135","B、110—125","C、130—140","D、135—140"]
以下不属于膳食纤维生理功能的是() ["A.增强肠道功能","B.预防大肠肿瘤","C.降低血胆固醇","D.提供能量"]
广泛性分销渠道