【简答题】Conversation One 1. A ) A lot of preparation is needed before doing real climbing. B ) Rock-climbing is not erous if you are strong enough. C ) The man has chosen the class of rock-climbing. D ) T...
【简答题】As if there weren’t enough of them in the world already, scientists have succeeded in cloning flies. The alike fruit flies are the first insects ever cloned, says the Canadian team that created them. ...