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【判断题】
行程开关是利用生产机械运动部件的碰压使其触头动作，从而将机械信号转变为电信号，使运动机械按一定的位置或行程实现自动停止、反向运动、变速运动或自动往返运动等。A.
正确
B.
错误
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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
【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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