六級(jí)考試快速閱讀實(shí)戰(zhàn)練習(xí)（2） 六級(jí)考試快速閱讀實(shí)戰(zhàn)練習(xí)（2）

本實(shí)戰(zhàn)練習(xí)能迅速幫助廣大考生提高閱讀水平，考生可在快樂(lè)閱讀中提升應(yīng)試水平，在應(yīng)試備考中享受快樂(lè)閱讀技巧篇，強(qiáng)化提高篇，精彩時(shí)文、美文導(dǎo)讀篇，全真模擬沖刺篇。集知識(shí)性、趣味性、可讀性于一體，篇篇精彩。富指導(dǎo)性、實(shí)用性、實(shí)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.