【单选题】When a battery becomes completely charged, both positive and negative plates become ( ) and the electrolyte becomes ( ).
【判断题】只要一个月经周期提前七天以上就是月经先期。
【单选题】When a battery becomes completely discharged, both positive and negative plates become_____ and the electrolyte becomes _____.
【判断题】月经期就是子宫腔的内膜剥落,并以血液的形式将其从阴道排出。月经周期是女性特有的以 28 天为一周期的循环过程。
【单选题】见于史书记载的首次人工开凿大型水体的园林是一下哪座园林?
【简答题】重度中暑可分为:________、__________和__________。
【单选题】以类似科学研究的过程、方法和形式进行的学习称为( )