单项选择题

A．oxygen.
B．ancient weather.
C．carbon dioxide.
D．temperature.
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单项选择题
A．negotiating about photographic material.B．negotiating an automobile agreement.C．facing serious problems in trade.D．on the verge of a large-scale trade war.
A．negotiating about photographic material.
B．negotiating an automobile agreement.
C．facing serious problems in trade.
D．on the verge of a large-scale trade war.
单项选择题
A．opposition.B．support.C．ambiguity.D．indifference.
A．opposition.
B．support.
C．ambiguity.
D．indifference.
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