Your company has multiple DNS servers in the main office. You plan to install DNS on a member server in a branch office. You need to ensure that the DNS server in the branch office is able to query any DNS server in the main office, and you need to limit the number of DNS records that are transferred to the DNS server in the branch office. What should you do?()
A. Configure a secondary zone on the DNS server in the branch office.
B. Configure a stub zone on the DNS server in the branch office
Configure a stub zone on the DNS server in the main office.
D. Configure a primary zone on the DNS server in the branch office.
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麻风病的临床特点为()。
A. 皮损处或四肢远端有不同程度的冷热觉、痛觉或浅触觉障碍
B. 局部常有出汗减少或闭汗
C. 可伴有周围浅神经粗大
D. 部分病人用皮肤刮切法涂片可查到麻风菌
E. 以上均是
迟发型超敏反应主要是由介导的()
A. IgM
B. IgG
C. IgE
D. 补体
E. 效应T细胞
下列哪项特征不是队列研究的特点()
A. 所得结果为结论性的
B. 容易产生选择性偏倚
C. 一次调查涉及一个因素
D. 调查时间较长
E. 可用人年计算死亡率