对20世纪60―80年代美苏关系的概括，较为全面的是（）。 苏联加强对外扩张，美苏争夺世界霸权。 美苏对峙，互有攻守，双方争夺世界霸权。 美国采取强硬政策反击苏联的全球扩张。 美苏争夺全球战略优势，军备竞争不断升级。
You are working with CIS .com. who has identified the following IP applications on their network: IP voice and voice signaling, streaming video, PeopleSoft, Microsoft SQL, e-mail, and Internet traffic. If the voice traffic was classified as EF and AF31, the e-mail was classified as AF11, and the Internet traffic was classified as DSCP 0, how would the transactional traffic represented as PeopleSoft and Microsoft SQL be classified?（） DSCP AF21。 DSCP CS4。 DSCP AF33。 DSCP AF13。
在形状公差中，符号“－”是表示（）。 圆度。 线轮廓度。 直线度。 倾斜度。
层错能
全国人大会议每年举行一次，由委员长召集。
被称为俄国“比较文学之父”的是（）
