电容器充放电过程的快慢由哪些因素决定?
参考答案:电容器充放电过程的快慢主要决定于充放电回中R和C的大小。
句型转换 每个空格只准填一个单词。(共5小题,每小题2分,满分10分)
小题1:Tony wants to learn Chinese because he likes Chinese food. (对画线部分提问)
______ does Tony to learn Chinese?
小题2:Lucy gets on well with her classmates. (对画线部分提问)
______ ______Lucy get on with her classmates?
小题3:They are enjoying themselves in the zoo. (改为同义句)
They are _______ _______ _______ _______ in the zoo.
小题4:There will be some robots in our home. (改为否定句)
There ______ be ______ robots in our home.
小题5:I spend much money on books every year. (改为同义句)
I ________ much money ________ books every year.
当电子层作为最外层时,最多容纳8个电子;当它作为次外层时,最多容纳18个电子。该电子层可能是 [ ]
A.K层
B.M层
C.L层
D.N层