【单选题】当 时,阻抗角 为0, ,电压与电流( ),电路为( )。这时电路发生串联谐振。
【单选题】(盐城期中)Images of school gyms____ with parents have been widely shared on social media, causing a heated debate.
【多选题】According to the speaker Zhang Xinyue, how can we improve autonomous learning ability?
A.
Use time efficiently and learn time management.
B.
Try to limit procrastination.
C.
Arrange the time as reasonably as possible
D.
Take more notes. Summarize and summarize some complex problems as well as those that you think are difficult.
【多选题】How can we improve our empathetic ability according to the video?
A.
Be observant of others
【单选题】结帐前发现账簿或者凭证的文字或数字发生错误时,可以采用的错账更正方法是()
【多选题】How can we improve our English?
A.
By reading the textbook.
B.
By studying with a group.
C.
By listening to English songs.
D.
By playing foodball with schoolmates
【单选题】反应相间短路的阻抗继电器通常采用0°接线,所谓0°接线是指三相对称的情况下,当____时,加入继电器的电流与电压之间的夹角为0°。( )
【判断题】视图中的封闭线框必定表示一个平面的投影。