速冻的优点?
癫痫持续状态的诊断标准是() ["癫痫发作连续30min以上","频繁反复抽搐","反复发作持续30min以上,发作间歇期意识不恢复","惊厥伴有昏迷","多因癫痫病人突然停药或药物中毒导致"]
某一筛子的累计筛余百分率等于大于筛孔的各级筛余量的总和,而()减去累计筛余百分率即称为通过百分率。 ["50%","100%"]
由原色与相邻的间色混合称为()。 ["颜色","复色","补色","对比色"]
墙体的可砌高度是()。 ["1.5m","1.2m","1.6m","1.0m"]
在做阻波器的阻抗测量时,为什么要求测量到的阻波器阻抗中电阻分量满足要求?