单项选择题

Today, housework has been made much easier by electrical _________.

A．appliances
B．facilities
C．apparatus
D．equipment
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单项选择题
According to the passage, which of the following is TRUE
A．The transformation process of a department store from inputs into outputs is different from that of a farm.
B．The conversion process of a department store from inputs into outputs is the same as that of a farm.
C．The transformation process can be totally free from random fluctuation.
D．Random fluctuation is important to the conversion process.
单项选择题
Which of the following will not result in random fluctuation
A．Unreliable equipment.
B．Cash input.
C．Management skills.
D．Earthquake.
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