(call) “greenhouse” gases，the most important one 5.

　　(be) carbon dioxide. There or the are called being 课文语法填空 答案 These gases trap heat from the sun and therefore warm the earth，without 6.

　　the earth would be about thirty-­three degrees Celsius cooler 7.

　　it is.But 8.

　　(increase) amount of extra carbon dioxide means that more heat energy is trapped in the atmosphere causing the global temperature to go up. 9.

　　the other hand，scientists like George Hambley believe that any warming will be mild with few bad environmental consequences and more carbon dioxide is 10.

　　(actual) a positive thing. which than increased On actually 答案 返回 边讲边练

　　突破核心考点

　　quantity n.数量；量 1. in quantity大量 quantities of＋名词＋复数谓语动词 许多…… 应试指导　主谓一致的考查 (1)Quantities of food and tents were sent to earthquake­-stricken areas from Shandong. 大量的食品和帐篷从山东运往了地震灾区。 (2)My brother bought a large quantity of books. 我弟弟买了大量的书。

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