常伴单纯红细胞增生不良的纵隔肿瘤是（）
A.淋巴瘤
B.胸腺瘤
C.畸胎类肿瘤
D.胸骨后甲状腺肿
E.神经源性肿瘤
参考答案：B
—You must get excited about going to France to study oil painting.
—___________,but I’m afraid I can’t do well because my French is too poor.
A．I don’t know yet
B．Certainly not
C．Well,I ought to
D．All right
葡萄胎排空后子宫局部侵犯的发生率约为
A．5%B．10%C．15%D．20%E．25%
