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     Linda was a sixteen-year-old girl in Canada. She was feeling bad for several days. Her mother took her to a hospital and the doctors found out that she had cancer.

     Linda's life changed. She began to go to the hospital often for treatment（治疗）, and she also became depressed.

     The hospitals and the doctors were good, but Linda did not have hope herself. Linda's mother called a flower shop close to the hospital. “I want some beautiful flowers for my daughter. She is a teen girl with cancer.” She told the shop owner.

     Later, the flowers arrived. Then Linda saw something unusual. It was a card. It read:Linda, I own (拥有) this flower shop. I had cancer when I was fifteen years old. I am 24 years old now. Good luck. My heart goes out to you.

                                                                              Yours,

                                                                               Alice

     Linda smiled. She finally felt some real hope. She found the will (意志) to 1ive.

     Little things make a big difference. All of us can give little things like kindness, encouragement and hope to others.

汽车已进入普通家庭，小明通过对汽车的观察发现，前窗玻璃大多是倾斜的，这是因为前窗玻璃倾斜时，根据____ 成像特点，夜间车内乘客或其它物体所成的像在玻璃的前上方，避免干扰司机视觉；而汽车前灯安装在离地面较近的车头位置，有利于司机更好看清前方道路状况，这是因为在同一种物质中光是____ ．

The underlined part(下划线部分) in      is pronounced(发音)differently.