若要减小结构的自振频率,可采用的措施是:() ["增大刚度,增大质量","减小刚度,减少质量","减少刚度,增大质量","增大刚度,减少质量"]
滴眼剂滴眼后在受体部位的可利用度与下列哪个因素无关() ["结膜囊内药物动力学","滴眼剂的用药频率","药物对角膜的通透性","药物在眼内的清除率","药物在眼内的分布"]
单自由度体系的其他参数不变,只有刚度增大到原来刚度的两倍,则其周期与原周期之比为:() ["['1/2","1/
","2","
"]
关于左室的压力一容量关系,以下何者错误() ["后负荷及心室收缩力不变,前负荷增加时,SV及EF增加","前、后负荷不变,收缩力减弱,SV及EF下降","前负荷及收缩力不变,后负荷增加时,SV及EF下降","前负荷及收缩力不变,后负荷降低时,SV及EF增加","前、后负荷不变,收缩力增加时,SV及EF增加"]
为使滴眼剂对角膜的通透性增强,可对滴眼剂() ["改变pH值","加表面活性剂","加赋形剂","采用低分子药物","所有以上措施"]
农村信用社员工在哪两种情况下可以办理存款解冻手续?