流行期间,手足口病的主要传染源是
A.患者
B.重复感染
C.潜在性感染
D.既往感染过
- · 有5位网友选择 B,占比50%
- · 有3位网友选择 C,占比30%
- · 有2位网友选择 A,占比20%
A.患者
B.重复感染
C.潜在性感染
D.既往感染过
A、Werner's syndrome is a premature aging illness, possibly caused by a defect in DNA repair.
B、Dietary restriction in mammals reduces the production of DNA damaging free radicals in the mitochondria.
C、Senescent cells in culture that have stopped dividing often express p21 and p16, proteins that are normally activated in response to DNA damage.
D、All of these facts are consistent with a model for aging based on DNA damage.
A.设计交底和图纸会审已完成
B.施工组织设计已由总监理工程师签认
C.施工报批手续已批复
D.施工单位现场质量、安全生产管理体系已建立,管理及施工人员已到位,施工机械具备使用条件,主要工程材料已落实
E.进场道路及水、电、通信等已满足开工要求。
为了保护您的账号安全,请在“简答题”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!