铅酸蓄电池极板在数量上（）。
A、正极板比负极板多一片；
B、负极板比正极板多一片；
C、正负极板数量相等；
D、没有明
参考答案：B
Born into a family with three brothers, David was _____ to value the sense of sharing.[ ]
A. brought up
B. turned down
C. looked after
D. held back
工作结束前如何做好献血现场整理？
