【单选题】模拟信号和数字信号是两种主要通信信号,其中抗干扰能力较强的是( )
【单选题】Good secretaries will also ________________the way they dress for work.
【单选题】按误差出现的规律分,可分为随机误差,系统误差和( )。 其中系统误差是可预知的,随机误差是不可预知的但服从( )规律。
【单选题】What’s the difference between ordinary secretaries and executive secretaries?
A.
Ordinary secretaries work longer hours.
B.
Executive secretaries have more responsibilities.
C.
Executive secretaries work with doctors and lawyers.
D.
Ordinary secretaries work in small companies only.
【简答题】Good secretaries are extremely efficient and well _______ (organize).
【判断题】调频广播基于智能位置信息的差异化信息服务,具有紧急广播和数据推送功能。( )
【单选题】当开挖深基坑有可能出现流砂,且靠近原有建筑物开挖时,护壁支撑方式宜选用( )。