【单选题】When is the third writing assignment due?
A.
By the end of the third week.
B.
By the end of the fifth week.
C.
By the end of the sh week.
D.
By the end of the ninth week.
【多选题】导游人员处理游客的不当言行要特别注意“四个分清”,即()
【单选题】构造LAN时,一般不采用的方案是(41)。采用粗细电缆混接的条件下,若用100m细电缆,则在没有中继器时网络的最大可延伸距离为(42)。在光纤通信中,单模光纤一般比多模光纤的直径(43)。光纤采用SDH传输方式时,其基本速率可达到(44),在光纤上采用ATM可以组建高速网络,这些网络一般是(45)。
【单选题】关于光纤通信发展的四个阶段,以下描述不正确的是()
A.
第一阶段(1966-1976年),实现了波长850nm低速率(34Mbit/s或45Mbit/s)单模光纤通信系统,无中继传输距离约为10km。
B.
第二阶段(1976-1986年),实现了工作波长为1310nm、传输速率为140-565Mbit/s的单模光纤通信系统,无中继传输距离为50-100km。
C.
第三阶段(1986-1996年),以超大容量和超长距离为目标,实现了1550nm色散移位单模光纤通信系统。采用外调制技术,传输速率可达2.5-10Gbit/s,无中继传输距离可达100-150km。
D.
第四阶段(1996-近年),主要研究光纤通信新技术,超大容量的密集波分复用技术使最高速率达到10Tbit/s。
【单选题】The word 'sunset' occurring in the title of the novel most probably means
A.
the end of the heroine's life.
B.
the end of one's life.
C.
the end of traditional life.
【判断题】必须承认,时间有一种逻辑,一种不是逻辑的逻辑,这样才不至于过多地要求实践给出它所不能给出的逻辑,从而避免强行向实践索取某种不连贯性,或把一种牵强的连贯性强加给它。
【简答题】After comparing 'They stopped at the end of the corridor. ' with 'At the end of the corridor, they stopped' , you may find some difference in meaning, and the difference can be interpreted in terms of...
【单选题】The word 'Sunset' in the title of this novel most 'probably means
A.
the end of the heroine's life.
C.
the end of the traditional way of life.