2000Ah容量的蓄电池，以1000A放电，放电率（）
A．0．5h
B．1h
C．2h
D．10h
参考答案：B
以三棱柱的顶点为顶点共可组成______个不同的三棱锥．
.Our neighbor has ______ ours.
A．as a big house as
B．as big a house as
C．the same big house as
D．a house the same big as
