【单选题】进入新时代,我国社会主要矛盾已经发生转化,已经转化为()。
A.
人民日益增长的美好生活需要和不平衡不充分的发展之间的矛盾
B.
人民日益增长的物质文化需要和落后社会生产之间的矛盾
【单选题】关于楞次定律,下列说法正确的是( )
C.
感应电流磁场的方向可能与原磁场方向相反,也可能与原磁场方向相同
【多选题】(多选)关于楞次定律,下列说法中正确的是( )
【多选题】Ethics for a speaker to get ready for his speech include_________.
A.
making sure the goals are ethically sound
B.
being fully prepared for each speech
C.
being honest in what the speaker says
D.
avoiding man-calling and other forms of abusing language
【多选题】Ethics for a speaker to get ready for his speech include_________
A.
making sure the goals are ethically sound
B.
being fully prepared for each speech
C.
being honest in what the speaker says
D.
avoiding mane-calling and other forms of abusing language
【单选题】关于楞次定律,下列说法正确的是( )
A.
感应电流的磁场总是要阻碍引起感应电流的磁通量的变化
B.
闭合电路的一部分导体在磁场中运动时,必受到磁场的阻碍作用
C.
原磁场穿过闭合回路的磁通量增加时,感应电流的磁场与原磁场同向。
D.
感应电流的磁场总是跟原磁场反向,阻碍原磁场的变化
【多选题】按项目信息来源,设计阶段信息分为( )五个大类。
【多选题】按项目信息来源,设计阶段信息分为( )五个大类。
【单选题】What does the man want?