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
Everyone is supposed ________ a seat belt in the car.
A. wearing B. to be worn D.wear D. to wear
某服装厂一季度生产皮装3621件,其中有653件是皮夹克,其余都是皮大衣。那么皮夹克比皮大衣少 ( )
A.3215
B.2805
C.2315
D.2435