单项选择题

"Sound", as defined by the psychologists,

A．can be measured in the same way that "noise" is measured
B．may be extremely harmful to health
C．is not at all different from "noise"
D．can be measured by machines

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热门试题

单项选择题

According to the passage, in which way have the elassitied advertisements changed nowadays

A．They depend more on display type.
B．More money is charged for them.
C．They are divided into more groups.
D．They are less formal.

单项选择题

The examples given of types of classified advertisement are mentioned EXCEPT ______.

A．houses for sale
B．people who are asking for help
C．something that has been lost
D．job vacancies