支配臂部屈肌群的神经是
A．正中神经B．尺神经C．肌皮神经D．桡神经E．腋神经
参考答案：C
Tom: Is he thirsty?
Jim: __________ [ ]
A. He is thirsty.
B. He is a boy.
C. Yes, he is.
D. Yes, she is.
产生汽水共腾的原因是什么？
