生产BOPP产品,要求等规度控制指标范围在()%。 ["A、90.0-95.0 ","B、95.0-97.0 ","C、96.0-99.0 ","D、>99.0"]
对测量用电压互感器采用闭路退磁法时,应在二次绕组上接一个相当额定负荷()倍的电阻,给一次绕组通以工频电流,由零升至1.2倍的额定电流,然后均匀缓慢地降至零 ["10","5~10","5~20","10~20。"]
关于新生儿出生后24小时内护理,错误的是() ["热水袋保温","面部出现白色或青紫应立即清理呼吸道","哺乳后立即换尿布","为防止呕吐应予侧卧位","脐带出血多时应重新结扎"]
不是内毒素的特性是()。 ["细菌的细胞壁裂解后才游离出来","毒性稍弱","抗原性弱","耐热","经甲醛处理可脱毒成为类毒素"]
简述印花布。
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