题目内容

Task 1 Please write down the missing words or phrases according to what you hear.There are two ways to make a hotel room reservation. Firstly, to make a reservation ( 1 ) use our online Room Reservation Services. Click here to begin the registration ( 2 ) to check ( 3 ) and then make a reservation. Secondly, you can also make a room reservation through a ( 4 ) listed below. Worldwide travel agencies that service Hakone Hotel Kowakien : EGL Tours Company Limited ( Hong Kong ).The hotline is (852)3692-0888.The Fax number is ( 5 ). The address is 15/F EGL Tower, NO. 83 Hung To Road. Kwun Tong, Kowloon, Hong Kong.

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信息源中的同一信息可以为多个信息接受者使用,这种特性称为信息的( )

A. 扩散性
B. 共享性
C. 时效性
D. 储存性

信息与其他物资资源一样,会随着使用频率的加大而发生损耗。( )

A. 对
B. 错

简述城轨中集中告警系统的作用。

以下叙述正确的是

A. 幅度谱反映了各频率成分在信号中所占的绝对比重
B. 信号的频谱只有理论意义,无实际意义
C. 通过对幅度谱的观察可以了解信号中的主要频率
D. 通过对相位谱的观察可以了解信号中的主要谐波分量

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