已成功培育出一头能够产类似人奶的奶牛。故选C项。

2．Which of the following can best replace "more closely resemble" in Paragraph 4?

　　A．have more varieties than

　　B．be more similar to

　　C．have more nutrition than

　　D．be more different from

　　解析：选B　词义猜测题。根据第四段的第二句可知，阿根廷的研究组称中国研究组仅放入了一个人类基因，而他们的研究包含了两个，这意味着产出的牛奶将和人奶更相似。故选B项。

3．What can be inferred from Cristina Kirchner's statements?

　　A．She was quite satisfied with the research done by the institute.

　　B．She considered it an honor to name the special cow.

　　C．She felt it improper to be named after the cow.

　　D．She refused to give a name to the cow out of self­respect.

　　解析：选A　推理判断题。根据最后一段Cristina Kirchner的话"made all Argentines proud"可推知，她对这个研究感到非常满意。故选A项。

　　B

　　We use robots for tasks like building cars and sorting mail, but can we use them as stand­up comedians (单口相声演员) in the future? One robot called RoboThespian has been trying out some jokes.

　　Researchers from Queen Mary University of London organized RoboThespian's performances to test whether it could be as funny as a human.

　　The electronic comedian went on stage for a show with British comedians Andrew O'Neill and Tiernan Douieb, performing the same jokes as Douieb but with a few changes - it is a robot after all. The robot has some advantages over human comedians, too.

　　"We used computer vision and audio software to notice the response of each audience member, something a human comedian cannot do，" said Kleomenis Katevas, the robot's programmer. "The machine used this information to decide who to look at and which gestures to use."

The robot also has other advantages over human comedians. Impressions of other people and sounds are very popular ways for performers to get laughs, and according to