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【单选题】
如果线圈的形状、匝数和流过它的电流不变,只改变线圈中的媒质,则线圈内 ()A.
磁场强度不变，而磁感应强度变化
B.
磁场强度变化，而磁感应强度不变
C.
磁场强度和磁感应强度均不变化
D.
磁场强度和磁感应强度均要改变
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举一反三
【简答题】A ______ often marks a slight pause in a sentence
【判断题】The fourth and final stage of adaptation, also called “Acceptance” often marks the point when the person feels comfortable in the society and understands how things are done.
A.
正确
B.
错误
【判断题】The coming of the “Four Great Anhui Troupes” to Beijing often marks the birth of Beijing opera.( )
A.
正确
B.
错误
【单选题】A certain type of sentence occurs frequently in one text, and this often marks a particular of the text and also marks a particular function of the text.
A.
style
B.
field
C.
tenor
D.
mode
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