腹部损伤后行腹腔穿刺抽出不凝固血应考虑
A．后腹膜血肿B．腹壁血肿C．空腔脏器破裂D．实质脏器破裂E．误穿入腹腔血管
参考答案：D
Our teacher looked here and there on our playground _____ looking for something.[ ]
A. even though
B. even if
C. as if
D. only if
发生操作过电压的原因有哪些？
