肾损伤部分切除术的指征是()
A.肾下极碎裂伤修补困难
B.持续的危及生命的出血
C.肾蒂血管切割伤
D.肾被膜裂伤
E.肾实质深度裂伤,破入肾盏肾盂
参考答案:A
He raised his gun, pointed it at a bear and _____aim, shot at it.
A.took careful
B.taking careful
C.to take careful
D.taken careful
简述 EDTA 滴定法测定硫酸盐的原理