慢性肉芽肿病发病原因是()
A.红细胞内酶缺陷
B.T细胞功能缺陷
C.B细胞功能缺陷
D.中性粒细胞功能缺陷
E.补体功能缺陷
参考答案:D
He never ______ no matter how many difficulties he has. [ ]
A. gives up
B. gives in
C. works out
D. goes away
国家是土地产权的主体,有时甚至是唯一的主体。()