六級考試快速閱讀實戰(zhàn)練習（2） 六級考試快速閱讀實戰(zhàn)練習（2）

本實戰(zhàn)練習能迅速幫助廣大考生提高閱讀水平，考生可在快樂閱讀中提升應試水平，在應試備考中享受快樂閱讀技巧篇，強化提高篇，精彩時文、美文導讀篇，全真模擬沖刺篇。集知識性、趣味性、可讀性于一體，篇篇精彩。富指導性、實用性、實戰(zhàn)性...

The world was stunned by the news in the summer of 1995, when a British embryologist named Ian Wilmut, and his research team, successfully cloned Dolly the sheep using the technique of nuclear transfer. Replacing the DNA of one sheep’s egg with the DNA of another sheep’s the team created Dolly. Plants and lower forms of animal life have been successfully cloned for many years, but before Wilmut's announcement, it had been thought by many to be unlikely that such a procedure could be performed on larger mammals and life forms. The world media was immediately filled with heated discussions about the ethical implications of cloning.