题目

为了确定小豆作为林果行问套种作物的适宜性，实验小组通过田间试验和盆栽试验，测定了全光和弱光（全光的48%）条件下两个小豆品种的光合作用特性，结果如下表所示。回答下列问题∶（光补偿点是指光合作用与呼吸作用达到平衡时的光照强度；气孔导度表示气孔张开的程度） 品种 处理 最大净光合速率(μmolCO2.m-1s-1) 光补偿点(mol. m-3.s-1) 叶绿素含量(mg.g-) 气孔导度/ 2 (molH2O. m-3.s-1) A 全光组 14.99 45.9 2.29 0“Mum, what does it mean when someone tells you that they have a skeleton（骨骼）in the closet（衣橱）?” Jessica asked. “A skeleton in the closet?” her mother paused thoughtfully. “Well, it’s something that you would rather not have anyone else know about. For example, if in the past, someone in Dad’s family had been arrested for stealing a horse, it would be ‘a skeleton in his family’s closet’. He really wouldn’t want any neighbor to know about it.”“Why pick on my family?” Jessica’s father said with anger. “Your family history isn’t so good, you know. Wasn’t your great-great-grandfather a prisoner who was transported to Australia for his crimes?” “Yes, but people these days say that you are not a real Australian unless your ancestors arrived as prisoners.” “Gosh, sorry I asked. I think I understand now,” Jessica cut in before things grew worse.After dinner, the house was very quiet. Jessica’s parents were still quite angry with each other. Her mother was ironing clothes and every now and then she glared at her husband, who hid behind his newspaper pretending to read. When she finished, she gathered the freshly pressed clothes in her arms and walked to Jessica’s closet. Just as she opened the door and reached in to hang a skirt, a bony arm stuck out from the dark depths and a bundle of white bones fell to the floor. Jessica’s mother sank in a faint（晕倒）, waking only when Jessica put a cold, wet cloth on her forehead. She looked up to see the worried faces of her husband and daughter.“What happened? Where am I?” she asked. “You just destroyed the school’s skeleton, Mum,” explained Jessica. “I brought it home to help me with my health project. I meant to tell you, but it seemed that as soon as I mentioned skeletons and closets, it caused a problem between you and Dad.” Jessica looked in amazement as her parents began to laugh madly. “They’re both crazy,” she thought.【小题1】According to Jessica’s mother, “a skeleton in the close” means ______.A．a family honorB．a family storyC．a family secretD．a family treasure【小题2】What can we learn about some Australians’ ancestors form Paragraph 2?A．They were brought to Australia as prisoners.B．They were the earliest people living in Australia.C．They were involved in some crimes in Australia.D．They were not regarded as criminals in their days.【小题3】Jessica’s mother fell down into a faint because she was ______.A．frightenedB．knockedC．injuredD．surprised【小题4】Why did Jessica bring a skeleton home?A．She planned to keep it for fun.B．She needed it for her school task.C．She was curious about it.D．She intended to scare her parents.【小题5】Jessica’s parents laughed madly at the end of the story probably because ______.A．they were crazyB．they were over excitedC．they realized their misunderstandingD．they both thought they had won the quarrel