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

本實戰(zhàn)練習(xí)能迅速幫助廣大考生提高閱讀水平，考生可在快樂閱讀中提升應(yīng)試水平，在應(yīng)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(dǎo)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(dǎo)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.

        
        Some of the most powerful people in the world have felt compelled to act against this threat. President Clinton swiftly imposed a ban on federal funding for human-cloning research. Bills were put in the works in both houses of Congress to outlaw human cloning because it was deemed as a fundamentally evil thing that must be stopped. But what, exactly, is bad about it? From an ethical point of view, it is difficult to see exactly what is wrong with cloning human beings. The people who are afraid of cloning tend to assume that someone would, for example, break into Napoleon's Tomb, steal some DNA and make a bunch of emperors. In reality, infertile people who use donated sperm, eggs, or embryos would probably use cloning. Do the potential harms outweigh