单项选择题
A．no other country can make one like it B．it is much cheaper to operate C．it is more sophisticated than Landsat 7 D．Terra will show energy gains
A．ordinary people like the television programme B．ordinary people are interested in pictures of paintings, jewellery, etc. C．the policemen can not catch the thieves themselves D．ordinary people may help the policemen get useful information about the criminals
A．helping the police find the criminals and giving the things back to the owners B．exciting ordinary people C．making the police popular D．frightening the thieves