苯妥英钠所致的牙龈增生，应与下列疾病区别，除了A．白血病牙龈增生B．青春期龈炎C．牙

4千米60米=______千米；1.25小时=______分．

仅用于甲亢征象或手术前准备的药物是（）

A.甲巯咪唑 

B.甲硫氧嘧啶 

C.丙硫氧嘧啶 

D.碘剂 

E.普萘洛尔

Which of the following practices should be included in a firm’s code of ethics（）

A. Providing the board with relevant corporate information in a timely manner and allowing board members or other insiders to purchase stock before shareholders can make purchases.

B. Neither providing the board with relevant corporate information in a timely manner or prohibiting board members or other insiders from purchasing stock before shareholders can make purchases.

C. Providing the board with relevant corporate information in a timely manner and prohibiting board members or other insiders from purchasing stock before shareholders can make purchases.

胃癌的主要转移途径是（）

A.肝转移

B.肺转移

C.骨转移

D.淋巴转移

E.腹腔种植转移

下图是具有两种遗传病的家族系谱图，设甲病显性基因为A，隐性基因为a；乙病显性基因为B，隐性基因为b。若Ⅱ-7为纯合子，请据图回答：

Ⅲ-10是纯合子的概率是（）