电源线路老化、裸露、插头插座无松动，不及时更换会造成什么后果？
参考答案：电源线路老化、裸露、插头插座无松动，不及时更换会造成人员触电。
对于贫血患者需要多次输血者，应选择（）。
A.全血
B.红细胞+血浆
C.浓缩红细胞
D.冰冻红细胞
E.半浆血
I ______ the poor rabbit, but I didn't have the right drugs with me at that moment. [ ]
A. saved
B. had saved
C. could save
D. could have saved
