Sandra likes eggs. She has ______ every day. [ ]
A. them
B. it
C. their
D. him
A
通过诱导免疫耐受可用于治疗()。
A.慢性细菌感染性疾病
B.病毒的持续性感染
C.自身免疫病
D.免疫缺陷病
E.恶性肿瘤
封闭楼梯间的墙体采用耐火极限不低于()的不燃烧体。
A.1.00h
B.2.00h
C.3.00h
D.4.00h