如图当电容器两端电压U等于3V时，电容器储集了电量，则该电容器的电容为（）。
A.A
B.B
C.C
D.D
参考答案：D
某种溶液里含有K+、Cu2+、SO42-、Al3+和Cl-，则该溶液中的溶质至少有（ ）
A．6种
B．2种
C．4种
D．5种
Peter's jacket looked justthe same as Jack's, but it cost _____ his. [ ]
A. as much twice as
B. twice as much as
C. much as twice as
D.as twice much as
电量，则该电容器的电容为（）。
电量，则该电容器的电容为（）。