肌内注射一般选择肌肉较厚，离神经、血管较远的部位。常用（）肌，其次（）肌、（）肌、（）肌及（）肌。
参考答案：臀大；臀中；臀小；股外侧；上臂三角
---- What’s wrong with him?
---- He doesn’t feel very well. The doctor _______ just now.
A．looked him over
B．looked him up
C．looked after him
D．looked for him
玻尔的原子结构模型
