如所示的是在一个电场中的a、b、c、d四个点分别引入检验电荷时,电荷所受的电场力F跟引入的电荷电量之间的函数关系.下列说法正确的是( )
A:该电场是匀强电场
B:a、b、c、d四点的电场强度大小关系是Ed>Eb>Ea>Ec
C:这四点的场强大小关系是Eb>Ea>Ec>Ed
D:无法比较E值大小
下列加下划线字的注音完全正确的一项是( )
My mother is a teacher of E____. She is very k____ to her students. She always h____ them with their lessons. After class she often t____ to them and l____ to them carefully. My mother loves her job and she is n____ be late for work. She goes to work on foot. It takes her h____ an hour to get to school. All the pupils in my class like her i____ class.
“第一条,…立法权均属于由参议院和众议院组成的合众国国会.第二条,…行政权属于美利坚合众国总统.第三条,…司法权属于最高法院…”.这则材料选自( )