题目

如果反射光线与平面镜镜面的夹角是400，则入射光线与反射光线的夹角是_____，人在平面镜中所成的像是______(选填“实”或“虚”)像。                                     答案：解析:略 My mom was a beauty who seldom spent time and money on her physical appearance—especially in terms of fancy clothes or hairstyles. She just kept beautiful in her way： rest, water, exercise, vegetables and laughter.My mom would tell me her father had her run his little corner store from the age of ten. She saw poor people come in, looking for food and making hard choices, like meat or cheese. She took their coins with an eye on the bottom line. It was up to her to ensure the register balanced at the end of the day. So from a young age, my mom had her mind conditioned about money.However, my mom had one weakness： diamonds. In 1958, my teenage dad gave her a diamond chip as an engagement（订婚）ring, which she proudly wore until she saved enough for an “upgrade". By then, she was in her thirties. Over the years, my mom also acquired other diamond pieces like earrings. Mom wore them proudly and she simply loved the way her diamonds sparkled（闪耀）.On my parents' 50th wedding anniversary, I treated them to dinner at a restaurant. It made her happy, but Mom had her eye on a big diamond to mark the occasion. My dad found her a six-carat（克拉）one. Mom said each carat represented a decade that she loved my dad, plus one to grow on. For the next six years, she never took it off her finger.Knowing how my mom loved that diamond made it more special when she left it to me. After wearing it on my hand for a year, I decided to set it into a necklace where it'd be closer to my heart. It reminds me of my mom every day, no matter what I'm doing, and it speaks to me in unique ways.【1】What can we know about Mom?A.She spent much on her makeup.B.She was a vain beautiful woman.C.She kept beautiful in a natural way.D.She was proud of her appearance.【2】What made Mom careful about spending money?A.The words of neighbors.B.Her life in a poor family.C.The choice of the poor people.D.Her experience in her father's store.【3】Mom most probably thinks of the diamonds as a sign of_____ .A.luckB.loveC.statusD.wealth【4】What is the best title for the text?A.Mother's Love for DiamondsB.Love Between Mother and DaughterC.Memories of Beautiful DiamondsD.Strong Love for a Determined Mother