联条的作用是将相邻单格电池的正、负极串联以提高整个蓄电池端（）。
A.电流
B.电压
C.电阻
D.电容
参考答案：B
delighted me most was my son was admitted to Beijing University.
A．That, what
B．That, that
C．What, that
D．What, what
普通混凝土用砂当含泥量减小时，混凝土的干缩（）。
