腹部外伤后突发腹痛腹肌紧张提示( )
A．腹部空腔脏器穿孔B．实质器官破裂C．胃肠道出血D．腹膜炎E．消化不良
参考答案：A
—Lost and Found Office, _______?
—I wonder if you have a camera of mine.
A．who’s that
B．what’s that
C．what if
D．can I help you?
通过人体的电流强度取决于( )。
A．触电电压B．人体电阻C．触电电压和人体电阻D．都不对
