单词:residual chromosome
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CNN Radio, I am Mitchell Right. Our cover story were getting in the first report of how things went in today's spring court hearing over the president's healthcare law. CNN's Lisa reports this sounds ominous first arguments. Day one focused on a tech
Scientists at the Whitehead Institute in Cambridge, Massachusetts say it's fortunate for humans that the Y chromosome is not on the verge of extinction. That's because the Y is the chromosome that makes males males. The outlook is less favorable for
This is the VOA Special English Health Report. A miscarriage is the natural loss of a pregnancy before the twentieth week. This happens to as many as twenty percent of known pregnancies. Experts say many pregnancies end before a woman even knows she
As Uganda looks to eliminate malaria, the country is engaged in a debate(辩论会) over the use of chemicals such as DDT in some of the world's most malarial regions. In the district of Apac in northern Uganda, the risk of malaria is higher than any
Autumn dusk, floating patches of dead leaves. Piece of the falling yellow leaves are always people feel sad and depressed. Fu Guo Dang Qi autumn slightly leisurely in my mind the layers of memories! Looked forward to, read the. Like an elegant lilies