对于数据库系统来说,常用的安全措施主要有()。
A.密码验证
B.身份验证
C.存取控制
D.权限设置
E.拒绝访问
参考答案:B, C
患者,男性,30岁,右下肢破溃10余天,周围出现皮疹4天。患者10余天前出现右下肢疖肿,未予处理后出现局部明显红肿伴脓性分泌物,近4天来疖肿周边出现红斑、丘疱疹、渗液,渐向四周扩展,皮疹处伴瘙痒。
根据患者病史及临床表现,诊断应考虑()
A.急性湿疹
B.自身敏感性皮炎
C.传染性湿疹样皮炎
D.继发真菌感染
E.接触性皮炎
The new stadium being built for the next Asian Games will be ________ the present one.[ ]
A. as three times big as
B. three times as big as
C. as big as three times
D. as big three times as