当循环体为空语句时，说明该循环不做任何工作，只起延时作用。
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在下列测定方法中，适用于测定硝酸盐氮大于2mg/L水样的方法是（）。
A. 紫外分光光度法
B. 戴氏合金法
C. 酚二磺酸分光光度法
D. 镉柱还原法
“巧而好度，必节；勇而好同，必胜；知而好谦，必贤。”出自荀子的（）。
A. 《天论篇》
B. 《儒效篇》
C. 《仲尼篇》
A network host is configured as follows: Host IP address: 192.168.16.183 Subnet mask: 255.255.255.224 Default gateway: 192.168.16.190 Which of the following statements describe the network to which this host is attached?（）
A. The default gateway is configured on a different subnet form this host.
B. The host is a member of the fifth usable subnet of the 192.168.16.0 network.
C. The subnetwork address for this host is 192.168.16.160/28.
D. The address of the next higher subnet is 192.168.16.192.
E. The address of the router interface that is attached to this subnetwork is 192.168.16.190.
F. There are 60 usable host addresses on this subnet.
查库登记簿：用于登记上级部门、支行对（）的检查记录。由会计主管登记保管。
A. 现金
B. 重要空白凭证
C. 代保管抵押（质押）品
D. 有价证券及其他重要物品
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