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第二篇Mental Retardation (智力迟钝)Mental retardation is a condition in which people have lower than normal intelligence and are unable to function at the level expected for their age. People with mental retardation are usually born with it, or it develops early in their life. They may also have some difficulty with daily living skills such as learning to read and write and caring for themselves.Doctors and other professionals determine that a person has mental retardation based on their intelligence and how well they can do everyday activities. Intelligence is the ability to learn and understand Levels of intelligence are measured by special tests called intelligence tests. The score a person gets on one of these tests gives a numerical (数字的) measure of a person’s intelligence. This is called an intelligence quotient (智商) or IQ.An average score on an IQ test is about 90 to 110. a person with mental retardation will usually score below 75 on an IQ test.The IQ test alone does not determine whether someone is mentally retarded a person must also have trouble with everyday activities such as getting dressed, eating, washing, or learning basic reading, writing, and arithmetic skills.Mental retardation is not a disease itself. It cannot be cured and it’s not contagious (传染的). This condition can be caused by several things that injure the brain or don’t allow the brain to develop normally. Many times we don’t know why a person has mental retardation.Sometimes it may be caused by genes. Genes are chemical units found in every cell. They carry the instructions telling cells what to do. Sometimes, children receive abnormal genes from their parents.a defective gene may also develop spontaneously. Neither parent would have passed on the gene, but the gene changes before the baby develops;Some other problems that can cause mental retardation also happen before a child is born. It is important for the brain to develop properly if a child is to have normal intelligence. "Planning a pregnancy is the most important decision most of us will make in our lifetime. A healthy lifestyle and good medical care should begin before a woman becomes pregnant and continue throughout the pregnancy," says Jodi Rucquoi, a genetic counselor from Connecticut. If a woman abuses alcohol or drugs or doesn’t eat well, there is a risk to the developing baby. Also, a premature birth or problems during childbirth can sometimes harm the baby’s developing brain. While premature babies are generally fine, there is a greater chance that they may have mental retardation.In some cases, a young child can develop mental retardation after being sick with a serious infection or other illness, or after suffering a bad head injury. a child can be taken as mentally retarded if he or she（）
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第二篇Mental Retardation (智力迟钝)Mental retardation is a condition in which people have lower than normal intelligence and are unable to function at the level expected for their age. People with mental retardation are usually born with it, or it develops early in their life. They may also have some difficulty with daily living skills such as learning to read and write and caring for themselves.Doctors and other professionals determine that a person has mental retardation based on their intelligence and how well they can do everyday activities. Intelligence is the ability to learn and understand Levels of intelligence are measured by special tests called intelligence tests. The score a person gets on one of these tests gives a numerical (数字的) measure of a person’s intelligence. This is called an intelligence quotient (智商) or IQ.An average score on an IQ test is about 90 to 110. a person with mental retardation will usually score below 75 on an IQ test.The IQ test alone does not determine whether someone is mentally retarded a person must also have trouble with everyday activities such as getting dressed, eating, washing, or learning basic reading, writing, and arithmetic skills.Mental retardation is not a disease itself. It cannot be cured and it’s not contagious (传染的). This condition can be caused by several things that injure the brain or don’t allow the brain to develop normally. Many times we don’t know why a person has mental retardation.Sometimes it may be caused by genes. Genes are chemical units found in every cell. They carry the instructions telling cells what to do. Sometimes, children receive abnormal genes from their parents.a defective gene may also develop spontaneously. Neither parent would have passed on the gene, but the gene changes before the baby develops;Some other problems that can cause mental retardation also happen before a child is born. It is important for the brain to develop properly if a child is to have normal intelligence. "Planning a pregnancy is the most important decision most of us will make in our lifetime. A healthy lifestyle and good medical care should begin before a woman becomes pregnant and continue throughout the pregnancy," says Jodi Rucquoi, a genetic counselor from Connecticut. If a woman abuses alcohol or drugs or doesn’t eat well, there is a risk to the developing baby. Also, a premature birth or problems during childbirth can sometimes harm the baby’s developing brain. While premature babies are generally fine, there is a greater chance that they may have mental retardation.In some cases, a young child can develop mental retardation after being sick with a serious infection or other illness, or after suffering a bad head injury. Which of the following is NOT true of mental retardation（）
在数据库技术中，实体集之间的联系可以是一对一或一对多的，那么“学生”和“可选课程”的联系为（）。
（四）南方某防波堤工程总长900m，堤头100m为直立式结构，堤身采用沉箱结构，其余800m为斜坡式结构，采用扭王字块护面，堤顶设置混凝土胸墙，混凝土强度等级为C30。胸墙断面尺寸为4×6m，分段长度为10m。施工单位进场后，因工期紧迫，项目经理部在编制好施工组织设计后，直接报送给业主和监理单位，经监理工程师审核确认后，工程正式开工。扭王字块安装施工时，监理工程师发现，扭王字块全部竖着整齐排列，经询问，施工人员认为这样安装整齐美观。胸墙为素混凝土结构，属大体积混凝土，为了防止胸墙出现裂缝，施工单位在配合比没计中掺入了Ⅱ级粉煤灰，取代15%的水泥，超量取代，超量取代系数为1.3；该配合比的水胶比为0.6，拌合水用量为180kg/m3 。胸墙混凝土浇筑正值夏季高温季节，浇筑时实测混凝土人模温度为38℃，混凝土终凝后，在混凝土表面铺设一层塑料薄膜，采用洒淡水潮湿养护7天。施工时，胸墙内部设置了测温系统，根据测温记录显示，胸墙混凝土内部最高温度为82℃，表面最高温度为52℃。后经检查发现，每段胸墙均出现了1～3条贯通性裂缝。工程完工后，整条防波堤作为-个单位工程进行了质量评定，施工单位作为核定单位，对单位工程的质量等级进行了核定。 本工程单位工程划分是否正确？并说明理由。
第二篇Mental Retardation (智力迟钝)Mental retardation is a condition in which people have lower than normal intelligence and are unable to function at the level expected for their age. People with mental retardation are usually born with it, or it develops early in their life. They may also have some difficulty with daily living skills such as learning to read and write and caring for themselves.Doctors and other professionals determine that a person has mental retardation based on their intelligence and how well they can do everyday activities. Intelligence is the ability to learn and understand Levels of intelligence are measured by special tests called intelligence tests. The score a person gets on one of these tests gives a numerical (数字的) measure of a person’s intelligence. This is called an intelligence quotient (智商) or IQ.An average score on an IQ test is about 90 to 110. a person with mental retardation will usually score below 75 on an IQ test.The IQ test alone does not determine whether someone is mentally retarded a person must also have trouble with everyday activities such as getting dressed, eating, washing, or learning basic reading, writing, and arithmetic skills.Mental retardation is not a disease itself. It cannot be cured and it’s not contagious (传染的). This condition can be caused by several things that injure the brain or don’t allow the brain to develop normally. Many times we don’t know why a person has mental retardation.Sometimes it may be caused by genes. Genes are chemical units found in every cell. They carry the instructions telling cells what to do. Sometimes, children receive abnormal genes from their parents.a defective gene may also develop spontaneously. Neither parent would have passed on the gene, but the gene changes before the baby develops;Some other problems that can cause mental retardation also happen before a child is born. It is important for the brain to develop properly if a child is to have normal intelligence. "Planning a pregnancy is the most important decision most of us will make in our lifetime. A healthy lifestyle and good medical care should begin before a woman becomes pregnant and continue throughout the pregnancy," says Jodi Rucquoi, a genetic counselor from Connecticut. If a woman abuses alcohol or drugs or doesn’t eat well, there is a risk to the developing baby. Also, a premature birth or problems during childbirth can sometimes harm the baby’s developing brain. While premature babies are generally fine, there is a greater chance that they may have mental retardation.In some cases, a young child can develop mental retardation after being sick with a serious infection or other illness, or after suffering a bad head injury. Which is NOT a possible cause of mental retardation（）
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