题目

If there’s one thing the British are good at, it’s watching telly. You may think the Americans would beat us at that, but we’ve taken and turned it into an art form. Like most people, our favorite TV subject is ourselves, which has led to a number of shows aiming to be as British as possible. So if you want to learn how to be British, sit down to a few episodes of these distinctly British shows. DOCTOR WHOPolitical aside, Doctor Who owes its long television life not only to a brilliant central character, terrifying alien foes and intelligent scriptwriting, but also to a distinctl关于机械的说法中，正确的是（ ）A．功率大的机械，做功一定多B．做功多的机械，效率一定高C．效率越高的机械，越省力D．做功越快的机械，功率越大