9.19. 平板电容器与电源相连, 现把两板间距拉大, 则
A. 电容量增大
B. 电场强度增大
C. 带电量增大
D. 电容量、带电量及两板间场强都减小
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Four countries make up the United Kingdom of Great Britain and Northern Ireland --________________.
____________________is usually reserved for family members and very close friends.
Business is best initiated through____________.
When finished eating, place knife and fork________________________.