题目

Mrs. White was going to have（生育）her first baby very soon．Yesterday her husband took her to a hospital, Mr. White helped her get into the car and drove her there. A nurse took Mrs. White to her room and told Mr. White that he could go home and she could call him when the baby arrived. But Mr. White said he liked to wait at the hospital. The nurse said, you may wait outside. Mr. White was walking up and down at about midnight when the nurse came out of the room and said, which would you like better, a boy or a girl? A girl, said Mr. White. I have an elder sister, and she loves me. We铝能用于冶炼难熔的金属(如矾、铬、锰等)，这是因为铝具有下列性质中的(　　)A．金属性和非金属性B．导电性C．熔点低D．还原性，在冶炼反应中放出大量热