中性元素是整个拔膜面中的什么?
参考答案:是整个拔膜面中唯一固定不动的元素,也称旋转轴。
Look over there-there’s a very long, winding path _____ up to the house. [ ]
A. leading
B. leads
C. led
D. to lead
大量输注库存血的患者需防止发生()
A.碱中毒和低血钾
B.碱中毒和高血钙
C.低血钾和低血钙
D.酸中毒和低血钾
E.酸中毒和高血钾