【简答题】A new coronavirus, a cousin of the SARS virus, has infected more than 10,000 people since the outbreak began in Wuhan, China, in December. Scientist Leo Poon, who first decoded the virus, thinks it li...
【单选题】Reading in DepthPassage 1Why do we cry? Crying makes sense if smoke gets in your eyes or if you’re cutting onions. The tears protect your vision. But what good is emotional crying?Crying often seems t...
【简答题】Why do we cry? Crying makes sense if smoke gets in your eyes or if you’re cutting onions. The tears protect your vision. But what good is emotional crying? Crying often seems to make people feel bette...