脑囊虫病的包囊分哪些层()
A．细胞层
B．胶原纤维层
C．胶质增生层
D．神经组织层
E．炎性细胞层
参考答案：A, B, D, E
________ a precious diamond necklace for his wife, Martin could hardly afford a tie for himself．
A．Having bought
B．Buying
C．Being bought
D．To buy
患者，女，35岁，闭经3年，内分泌检测血FSH55U/L，最可能的诊断是（）。
A.卵巢性闭经
B.垂体性闭经
C.子宫性闭经
D.肾上腺性闭经
E.下丘脑性闭经
