Scientists interest in three-parent children conies from the desire of eliminating______.
A．a rare and life-threatening inherited disease
B．a huge number of rarely-occurring inherited diseases
C．the genetic influence from unhealthy parents
D．mutations in the nuclear DNA

未分类题Which of the following statements about mitochondrial transplantation is true?A．It has been adopted as a medical procedure.B．It has been proved scientifically feasible.C．It is currently regarded as an illegal act.D．It involves artificial DNA modification.

未分类题What is the authors attitude towards the public 'uggh!' factor?

未分类题Why does the writer say 'You might be forgiven for thinking that...'?A．Solving the mystery of sleeping and waking requires new insights.B．Most of the other things people do regularly are biologically straightforward.C．The problem sounds rather grand.D．We still lack for progress though we've spent much more time studying it.

未分类题______, if he doesnt learn he knows nothing.A．A man is ever so cleverB．Be a man ever so cleverC．So clever as a man ever isD．No matter how a man is clever

未分类题If one travels on the Mediterranean cruise in the future,A．he she will become a cheapskate.B．it will cost him her more money.C．it will become more economical.D．there will be no free services.