急性乳腺炎最常见的病因是
A．乳管堵塞B．乳汁淤积C． * * 破损D．乳腺手术E． * * 内陷
参考答案：B
The girl arranged to have piano lessons at the training centre with her sister ________ she would stay
for an hour.[ ]
A. where
B. who
C. which
D. what
膀胱癌盆腔淋巴转移的诊断标准是淋巴结直径大于（）
A.5mm
B.10mm
C.15mm
D.20mm
E.25mm
