UM71低频调制信号Fc（低频信息）从10.3Hz至29Hz按（）递增共18种。 A_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

UM71低频调制信号Fc（低频信息）从10.3Hz至29Hz按（）递增共18种。

A.1.1Hz

B.1.2Hz

C.1.5Hz

答案

参考答案：A

填空题

Questions 14-18

·Using the information in the text, complete each sentence 14-18 with an expression from the list below.
·For each sentence (14-18), mark one letter (A-G) on the Answer Sheet.
·Do not mark any letter twice.

A. in emergencies
B. in the face of competition
C. in their own cars
D. in different towns
E. in the minority
F. in the local community
G. in the majority

Most people choose corner shops only ______.

多项选择题

群众可以通过哪些主要方式反映机构编制违纪违规行为（）

A、拨打全国统一的“12310”举报

B、邮寄信件

C、上门来访

D、发送电子邮件

E、传真