头顶部，前正中线旁开1.5寸的经脉是：
A．足少阳胆经
B．足太阳膀胱经
C．足阳明胃经
D．手少阳三焦经
E．足厥阴肝经
参考答案：B
The urge to go abroad for further study is strong, but it was not until last summer ________ I knew how powerful it could be.
A．who
B．that
C．where
D．before
