单项选择题

电空接触器一般使用在SS3型电力机车的（）。

A、主电路中
B、控制电路中
C、辅助电路中
D、电子电路

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单项选择题

SS3型电力机车主电路接地采用了（）套接地保护系统。

A、一
B、二
C、三
D、四

单项选择题

To which of the following items does IAS 41 Agriculture apply?
(i) A change in the fair value of a herd of farm animals relating to the unit price of the animals
(ii) Logs held in a wood yard
(iii) Farm land which is used for growing vegetables
(iv) The cost of developing a new type of crop seed which is resistant to tropical diseases
A.All four
B.(i) only
C.(i) and (ii) only
D.(ii) and (iii) only

A.All
B.(i)
C.(i)
D.(ii)