Because the two countries were  at _____ war, the people had ______ hard     

life.

A．/; the

B．the; the

C．/; a

D．a; a

6－巯基嘌呤核苷酸不抑制（）

A.IMP→GMP

B.IMP→AMP

C.酰胺转移酶

D.嘌呤磷酸核糖转移酶

E.尿嘧啶磷酸核糖转移酶