人类历史上第一次触及到了宇宙的一个极限原理是()
A、波粒二象性
B、光电效应
C、电磁感应
D、测不准原理
参考答案:D
---Do you think Peter is free today?
---I don’t think so. Recently he has been ______ the most of his time to prepare for the final examinations.
A.making
B.planning
C.using
D.getting
患者,男性,20岁,右上臂撞饬,中下段成角畸形,伤后腕关节不能主动背伸,各掌指关节不能主动伸直,除考虑肱骨干中下段骨折外,还应首先考虑何种合并伤
A.臂丛神经损伤
B.肌皮神经损伤
C.正中神经损伤
D.桡神经损伤
E.尺神经损伤