he may be able to provide public health officials with useful information more quickly than the usual methods. And he is applying the new tools to study disease outbreaks around the world.
四年级下册英语作文范文篇1 An old woman has a cat. The cat is now very old. She cannot run fast, and she cannot bite. One day the old cat sees a mouse. she jumps and catches the mouse. But sh
范文:When I was very small, I stayed at my hometown with my grandma. She is a deligent woman, she likes to grow vegetables and takes care of all the house chores. Though my parents ask her to quit
英语写话 My daily life My daily life I get up at six in the morning. I eat my breakfast at half past six. I go to school at seven. I have four different lessons in the morning. I have thre