题目内容
（请给出正确答案）
[主观题]
励磁控制系统的根轨迹在，则系统稳定（)。
A、上半平面
B、下半平面
C、右半平面
D、左半平面
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选词填空，了解活动策划师的主要工作内容。
plan、write、moniter、meet、make
Event managers mainly:
1.()with clients to understand the purpose of the meeting or event
2.()the event, including time, location, and cost.
3.()changes if clients find the event plan is not so realistic
4.()the event to ensure that every detail meets the client's requirements
5.()a report about the event
