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问题 单项选择题

“字偶距（Kerning）”和“字间距（Tracking）”的区别是什么？（）

A、字偶距应用到当前段落的每一行，字间距仅应用到选中字符

B、字偶距仅应用到当前光标左右的字符，字间距应用到当前选中的文本

C、字偶距仅应用到当前选中行，字间距应用到当前段落的每一行

D、字偶距仅应用到整个文档，字间距仅应用到选中字符

E、字偶距应用到选中字符，字间距仅应用到选中字符应用到当前段落的每一行

答案

参考答案：A

单项选择题

支气管哮喘可出现（）

A．瘀点 

B．充血性皮疹 

C．瘀斑 

D．血肿 

E．小红痣
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单项选择题

Most IP layer-based proxy mechanisms, such as network address translation (NAT), only support uni-directional proxy, from the internal network to external network (the Internet). The proxy establishes the communication channel by (86) IP addresses. The IP addresses must be (87) . These proxy mechanisms prevent applications that must establish return data channels from establishing their data channels, such as, multimedia applications. IP layer-based proxy mechanisms need additional software (88) for each application that uses (89) channels. SOCKS identifies communication targets through domain names, overcoming the restriction of using private IP addresses. SOCKS can use domain names to establish communication between separate LANs, with (90) IP addresses.

A．routable

B．locatable

C．path-selected

D．road-defined
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