第26题: [单项选择]Freezing is at present one of the ( )of preserving meat, fruit and Vegetables. A. most methods important B. methods most important C. most important methods D. important most methods 参考答案:C 答案解析:
第30题: [单项选择]ICMP协议是下面哪一个协议的缩写(). A. Internal Control Mail Protocol B. Intranet Control Message Protocol C. Internet Connection Message Protocol D. Internet Control Message Protocol 参考答案:D