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【多选题】
通常光栅传感器是由 、 、 、 和光电接收元件组成A.
光源
B.
透镜
C.
标尺光栅
D.
指示光栅
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举一反三
【单选题】I will do everything I can______you with the work.
A.
helping
B.
to help
C.
helped
D.
help
【简答题】My mother used to ask me what the most important part of the body was. Through the years I would guess that what I thought was the correct answer. When I was young, I thought sound was very important ...
【简答题】The professor wants the work (do) ______ with great care.
【单选题】— How will she deal with the work? — She doesn't want to do it by herself. She wants to ask someone else to do it, . [ ]
A.
yet
B.
instead
C.
too
D.
either
【简答题】Mother used to ask me what the most important part of the body is. Through the years I would&shMother used to ask me what the most important part of the body is. Through the years I would 1 at ...
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