单项选择题

Which organization was the first to study the impact of mobile phones on health

A．The International GSM Association.
B．The International Agency on Research on Cancer.
C．The Dutch technological research institute.
D．The 3G research organization.

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热门试题

单项选择题

The passage mainly talks about ______.

A．the impact of mobile phone signals on health
B．the negative impact of current signals on health
C．the long-term effects of mobile phones on health
D．the possible causes of the impact of mobile phones

单项选择题

______ leaves the office last should turn off the air conditioner.A) Who C) The personB) Whoever D) Anyone

A．______ leaves the office last should turn off the air conditioner.
B．Who
C．Whoever
D．The person
E．Anyone