以下哪项是桡神经主要功能（）
A.屈腕
B.屈指
C.伸指
D.屈腕
E.屈肘
参考答案：C
(2013·威海一模)—Would you mind me opening the window, sir?
—________. I am feeling a bit chilly.
A．By all means
B．Not in the least
C．I'm afraid not
D．I'd rather you didn't
u数和Bi数均可写成hl的形式，二者有何区别？
