眼球向下及向外运动减弱提示有损害的神经是（）
A.动眼神经
B.视神经
C.滑车神经
D.展神经
E.三叉神经
参考答案：C
—We’re going rock climbing tomorrow. Why not join us?
—_______ It’s said that there might be a thick fog then.
A．I disagree.
B．Great!
C．My pleasure.
D．That depends.
在Rt△ABC中，∠C=Rt∠，AB=c，BC=a，AC=b，已知c=9，b=1，则a=______．
