“十二经筋”中足三阳经筋
A．起于足趾结于腹
B．起于足趾结于面
C．起于足趾结于头
D．起于足趾结于胸
E．起于手指结于面
参考答案：B
—I hope you'll have a good journey.
—______ [ ]
A. Well done
B. Don't mention it
C. Certainly
D. Thank you very much
齿轮泵在与齿轮啮合处相贴合的固定件面上有一对凹槽，其作用是（）。
A．存油防干磨
B．平衡轴向液压力
C．防止汽蚀
D．防止困油
