Effective measures have been taken to prevent _______pollution.A．exhausted gasB．_刷题宝

题干

Effective measures have been taken to prevent _______pollution.

A．exhausted gas	B．exhausting gas
C．exhaust gas	D．exhaustion gas

上一题下一题 0.64难度单项选择更新时间:2015-06-11 11:15:03

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