何谓氧反常、钙反常、pH值反常?
氧反常是指用缺氧溶液灌流组织器官或培养细胞造成损伤后,再恢复正常氧供应,组织及细胞的损伤不仅未能恢复,反而更趋严重的现象。钙反常是指用无钙液灌流后再用正常含钙液灌流组织器官,可造成细胞和器官的代谢和功能障碍及结构破坏更趋加重的现象。pH值反常是指缺血后再灌注时迅速纠正缺血组织的酸中毒,反而会加重缺血再灌注损伤的现象。
You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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