发生输血过敏反应的病人体内大多数缺乏()
A.IgA
B.IgC
C.IgM
D.IgE
E.以上都不是
参考答案:A
She made ________her duty to help to deal with all the other people’s affairs in that town.
A.this
B.that
C.one
D.it
填一填。
(1)(a×b)×c= a×(___×___)
(2)45×5×4= 45×(___×___)
(3)6×25×4=___×(___×___)
(4)4×7×25=(___×___)×7
(5)28×54=54×___
(6)125×5×8×2=(___×___)×(___×___)