电容器电容量与极板间的电介质的介电常数∑值()。
A.无关
B.成反比
C.成正比
参考答案:C
化合物中酸性最弱的是()
A.5-羟基黄酮
B.6-羟基黄酮
C.7-羟基黄酮
D.4’-羟基黄酮
E.7,4’-二羟基黄酮
He talked happily about the men and books____interested him greatly in the school.
A that B when C who D which