把模拟信号进行数字化的过程有三步，分别是、、。

若原信号的最高频率为40π rad/s，采样角频率为100π rad/s，当使用理想低通滤波器对采样信号进行恢复时，其截止频率的取值范围为。

采样的三种情形包括过采样、、。

在不改变采样频率的条件下，可以有效避免出现频谱混叠的方法是：在采样之前，让信号经过一个抗混叠，目的是将振幅较小的分量截断。

发生频谱混叠现象时，往往是信号的分量部分出现混叠。

Which statement is LEAST likely to result in a productive meeting?

A. State the purpose of the meeting at the beginning.
B. Discuss issues as they come up, rather than distributing a formal agenda.
C. Pay attention to people and process as well as to the task at hand
D. If you don't take formal votes, summarize the team's consensus after each point

Which person is MOST likely to be considered a leader by team members?

A person who nods pleasantly throughout the meeting when anyone makes a comment but does not participate.
B. A person who makes everyone laugh throughout the meeting and doesn't get stressed out if not quite all the work gets done
C. A person who is always willing to run the team by giving orders, making demands, and doing all the talking
D. A person who talks a lot, listens effectively, and responds nonverbally to others in the team

A member of your collaborative writing team comes to you, upset with the way another team member treats her. Which of the following would be your BEST first response?

A. Tell her that she must solve this problem herself
B. Tell her about your problems with the same person
C. Give her some advice on how to handle the situation
D. Acknowledge her feelings

A team should strive for groupthink because it indicates harmony

A. 对
B. 错

Conversational style is an issue only when interacting with people from another culture.

A. 对
B. 错