直肠肛管周围间隙包括下列哪些间隙？（）
A.肛管周围间隙
B.坐骨肛管间隙
C.直肠前间隙
D.直肠后间隙
E.骨盆直肠间隙
参考答案：A, B, D, E
______________ into a college or university in the UK, we must prove ourselves to have a strong ability in spoken and written English.
A．Having been admitted
B．To be admitted
C．Being admitted
D．Admitted
绝经后妇女出现血性白带，除恶性肿瘤外最常见疾病是（）。
A.宫颈糜烂
B.宫颈息肉
C.宫颈管炎
D.老年性 * * 炎
E.宫腔积脓
