与容量小于100kV/A以上的变压器相连的接地装置，接地电阻不得大于（）Ω。
A.4
B.5
C.7
D.10
参考答案：D
Julie was good at German, French and Russian, all of she spoke fluently.
A．who
B．whom
C．which
D．that
实验室常用的补体灭活条件是 （）
A.56℃，30min
B.52℃，30min
C.45℃，30min
D.50℃，25min
E.37℃，25min
