(2013·湖北，22)Carbon dioxide, which makes a________between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.
A．differenceB．comparison
C．connectionD．barrier
D
句意：二氧化碳，在我們與太陽之間設(shè)置了一道屏障，阻止熱量輕易地散發(fā)到大氣層中，因此地球正變得更暖和。A項(xiàng)意為“區(qū)別，不同”；B項(xiàng)意為“對比，比較”；C項(xiàng)意為“聯(lián)系”；D項(xiàng)意為“障礙，屏障”。故選D項(xiàng)。
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