传染性单核细胞增多症是以单核一吞噬细胞系统为主要病变所在,其病理特征为
A.淋巴细胞恶性增生B.淋巴细胞良性增生C.肉芽肿性增生D.炎性增生E.化脓性病变
参考答案:B
People of different countries and regions, different nationalities and cultures have formed with solidarity an Olympic family, ______they have deepened understanding and enhanced friendship.
A.when
B.which
C.that
D.in which
事故调查组的组成应当遵循______的原则。
A.政府统一领导、分级负责 B.精简、效能C.及时、快捷 D.精准、功效