—I hear a foreigner will come to our school. Do you know him ?

—Yes, Edward,      university student from Europe, will teach us     art in his spare time.

A．an; /

B．an; an

C．a; /

D．an; the

有关左侧腹股沟滑动性疝的描述，下列哪项是不正确的

A．一般为难复性疝

B．疝内容物不会是大网膜

C．膀胱可成为疝囊的一部分

D．乙状结肠可成为疝囊的一部分