单句改错(每句均有一个错误)。

1.The woman has been to England for three years. _____

2.I think I've gone there once._____

3.Mr.Wang taught our maths last year._____

4.This is my first visit for Beijing._____

5.Miss Wang with her students have gone to the factory.______

肝豆状核变性（）

A.染色体核型为：46，XX（或XY）/47，21

B.血苯丙氨酸浓度＞0.24mmol/L（4mg/dl）

C.染色体核型为：45，XO/46，XX

D.染色体核型为：48，XXXY

E.血清铜蓝蛋白值：50mg/L