谁能大过我?(1)
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- 小学四年级
科学60秒:欧洲祖先原来很晚才学会生火的
Imagine life without fire. A lot of huddling for warmth. The ___1___ was that humans could make and control fire when they first migrated north to colder Europe, about a million years ago. But n...
二氧化碳能增加食欲
短文Carbon dioxide is a potent greenhouse gas. Levels of carbon dioxide, or CO2, in the atmosphere are increasing at an unprecedented rate. But what impact do higher CO2 levels have on plants?...
美元疲软是为何?(1)
美元一直处于疲软的状态,原因何在?The dollar has been weakening against several major currencies. One euro is currently worth about one dollar forty cents. A British pound is worth over two dolla...
布什回国(1)
布什从八国峰会回来,面对一团乱麻的国会,怎么办?President Bush says Monday's debate over a vote of no confidence in Attorney General Alberto Gonzales will have no bearing on whether the long-time...