已知函数y=（m+1）xm2−5是反比例函数，且图象在第二、四象限内，则m的值是（　　）

电视机的荧光屏上经常粘有灰尘，这是因为电视机工作时，屏幕上带 ____，而具有了 ____的性质．

把10cm长的线段进行黄金分割，则较长线段的长（$\sqrt{5}$≈2.236，精确到0.01）是（　　）

Mrs. Black lives in a small village. Her husband is dead. Her son, Jack, lived with her. He worked in a shop in the village, but then he found a job in town named Green Sea. He went to live there. Mrs. Black was very angry. She got on a train and went to see her son. Then she said to him, "Jack, why do you never telephone me?"
Jack laughed, "But, mother, you haven’t got a telephone. "No." She answered, "I haven’t, but you have got one. "