题目

阅读下列短文，从每题所给的 A、B、C和D四个选项中，选出最佳选项。Daily life has its satisfactions: The perfect reply to a friend's text message; The first after-work drink; The sound of another government U-turn. But do any really compare to the joy of going to sleep? That moment when the mess of 21st-century existence disappears into the non-judgmental hug of a bed?Somehow we have pushed this pleasure to the back of the queue. A third of American adults report sleeping less than the recommended seven hours. Many of us feel under-rested. For some, the problem is mode19．如图所示的容器中装有某种液体，试比较A、B、C、D四点液体的压强．它们之间的关系是（　　）A．A点压强小于B点压强B．B点压强大于C点压强C．C点压强等于D点压强D．C点压强等于B点压强