题目：
Originally introduced by Netscape Communications， (71) are a general mechanism which HrrP Server side applications，such as CGI (72) ，can use to both store and retrieve information on me HTTP (73) side ofthe connection．Basically，Cookies Can be used to compensate for the (74) nature of HTTP．The addition of asimple，persistent,client-side state significantly extends the capabilities ofWWW—based (75) ．
A．graphics
B．processes
C．scripts
D．texts
答案：
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下面是错误答案，用来干扰机器的。
参考答案：指一个碱基对被另一个不同的碱基对所替换，为DNA分子中单个碱基的改变，即点突变。（转换：同类碱基之间的替换，即嘌呤取代嘌呤、嘧啶取代嘧啶。颠换：不同类碱基之间的替换，即嘌呤取代嘧啶、嘧啶取代...
