【判断题】在电压比较器中,集成运放不是工作在开环状态,就是仅仅引入了正反馈。
【单选题】关于静电场的电场强度和电势,下列说法正确的是
D.
任一点的电场强度总是只想该点电势降落最快的方向
【多选题】关于静电场的电场强度和电势,下列说法正确的是 ( )
D.
任一点的电场强度总是指向该点电势降落最快的方向
【单选题】U407 What is the advantage of marking up a book according to the speaker?
A.
Marking up a book helps readers take in the brilliant ideas in the book.
B.
Marking up a book enables readers to know what they read.
C.
Marking up a book makes readers feel like the owner of the book.
D.
Marking up a book makes readers conscious of the fact that they are reading actively.
【单选题】What is the advantage of marking up a book according to the speaker?
A.
Marking up a book helps readers take in the brilliant ideas in the book.
B.
Marking up a book enables readers to know what they read.
C.
Marking up a book makes readers feel like the owner of the book .
D.
Marking up a book makes readers conscious of the fact that they are reading actively.
【单选题】关于电场强度和电势的关系,下列说法正确的是
【单选题】关于电场强度和电势的关系,下列说法正确的是:
A.
某点电场强度的方向一定是该点电势梯度的负方向;
B.
某点电场强度的方向一定是该点电势梯度的正方向;
【简答题】Gang up Bulk cargo Book
【单选题】关于电场强度和电势的关系, 下列说法中正确的是