H－live－n－one virus in the passage means ______.

参考答案:

D 37．答案为D 此题考查文章句意理解、细节定位。略读文章，发现在第2段中有a differentkind of bird flu virus．It is called the h-five-n-one virus。注意其中的代词it，它代表adifferent kind of bird flu virus，故选D为答案。