【简答题】Smart cars are superior to the ordinary cars in many ways. Write a list of of the feathers (there are altogether 6 feathers and you should find at least 5 of them) of smart cars as mentioned in the TE...
【单选题】The development of these gene technologies may be far in the future, but the moral and social issues raised by them should be discussed______, for once a technology has been______, it may be difficult...