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【单选题】
已知圆方程为 ,则圆心坐标和半径分别是( )A.
(-2,1),10
B.
(-2,1),
C.
(2,-1),10
D.
(2,-1),
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反馈参考答案：
举一反三
【单选题】andout of breath , we reached the top of the mountain and stopped the beautiful scenery .
A.
Tiring to admire
B.
Being tired admiring
C.
Tired to admire
D.
Tired admiring
【简答题】如何加强学风建设。
【多选题】When will you use a handout when you deliver an academic presentation?
A.
Your information is too detailed to fit on a slide.
B.
You don’t want to talk too much.
C.
You want your audience to have a full record of your findings.
D.
You are not sure of your information.
【单选题】When you deliver the presentation, you should _____.
A.
mumble and avoid direct eye contacts with the audience
B.
keep your pitch and speed of your presentation
C.
speak quickly so as to finish the presentation efficiently
D.
give the audience amiable facial expressions
【单选题】When you deliver the presentation, you should _____.
A.
mumble and avoid direct eye contacts with the audience
B.
speak quickly so as to finish the presentation efficiently
C.
keep your pitch and speed of your presentation
D.
give the audience amiable facial expressions
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