WhenastronautZhaiZhigangwasamiddleschoolstudent,hewrort...
问题详情：WhenastronautZhaiZhigangwasamiddleschoolstudent,hewrorte:"Ihaveadream offlyingintospacesoIcangetagoodlookattheEarth."Thisdreamcametruenearly30yearslater,whentheShenzhouVIIspacecraftliftedof...