单项选择题

A．mining is difficult
B．it costs a lot of money to preserve
C．they are difficult to be processed
D．they are non-renewable
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单项选择题
A．The heavy snowfall.B．The melting snow and heavy rain.C．The tropical storm.D．The dike has been destroye
A．The heavy snowfall.
B．The melting snow and heavy rain.
C．The tropical storm.
D．The dike has been destroye
单项选择题
A．held confirmation hearing for Mr. PerreyB．may have to decide whether to impose sanctions on North KoreaC．made discussions on whether to deploy Patriot Defense system to South KoreaD．made discussions on whether to deploy a single nuclear device to South Korea
A．held confirmation hearing for Mr. Perrey
B．may have to decide whether to impose sanctions on North Korea
C．made discussions on whether to deploy Patriot Defense system to South Korea
D．made discussions on whether to deploy a single nuclear device to South Korea
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