按使用性质分，地下室可分为普通地下室和( )。
A．人防地下室
B．全地下室
C．半地下室
D．一般地下室
参考答案：A
大电流接地系统发生接地故障时，三相短路电流是否一定大于单相短路电流？为什么？
For balance sheet purposes, inventories based on: （）
A. LIFO are preferable to those based on FIFO, as they more closely reflect the current costs.
B. weighted average are preferable to those based on FIFO, as they more closely reflect the current costs.
C. FIFO are preferable to those based on LIFO, as they more closely reflect current costs.
