题干

下列对下图曲线a和b的描述不正确的是

A:a和b可分别代表夏季晴天正午时分棉花叶肉细胞中二磷酸腺苷和还原型辅酶Ⅱ含量的变化

B:a和b可分别代表质壁分离过程中植物细胞渗透吸水能力和原生质体体积的变化

C:a和b可分别代表萌发的植物种子在出土之前蛋白质种类和干重的变化

D:a和b可分别代表艾滋病感染者在患病期间体内HIV和T淋巴细胞数量

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答案(点此获取答案解析)

A

同类题1

根据短文理解完成下列各题。
   March 16 is World Sleep Day. This year's slogan is “Breathe Easily, Sleep Well”. Its aim is to celebrate the *benefits of good and healthy sleep.
   Fangfang, from Liaoning, just became a high school student last September. She gets up at 5:30 a.m. every day and goes to bed at about midnight. Fangfang feels sleepy all the time. “I want to finish all my homework first,” she said.
   Sleep is like food for the brain. Enough sleep helps the body and brain grow and develop. According to the National Sleep *Foundation in the US, adults need seven to nine hours of sleep every night. For students who are 10 to 17 years old, a healthy amount is about eight to nine hours every night.
   But many students don't get enough sleep because of early school start time and heavy homework. About 80 percent of middle school students don't get enough sleep, the China Youth and Children Research Center reported. For some students, they want to sleep early, but they keep worrying about their schoolwork and can't fall asleep quickly. For others, they may even have insomnia, and usually they have to ask the doctors for help.
   These sleeping problems greatly *affect people's life. Some doctors found out that *lack of sleep for teenagers lead to poor grades. Students without enough sleep cannot pay attention in class or do well in sports. Also, they often become anxious easily.
   Luckily, with good sleep habits, it is easier to fall asleep. Some of these good habits include *avoiding drinks that make people excited late in the day, going to sleep at the same time every night, and sleeping in a comfortable place that is dark, quiet, and neither too warm nor too cold.
   More tips to get a good night's sleep:
   Exercising during the day. You'd better do sports three hours before going to bed.
   Don't eat big meals before bedtime. Drink a warm glass of milk. If you stay awake worrying about things, try making a list of things that you need to do before you go to bed.

同类题4

阅读下面的文字,完成下列小题。

材料一:

    健康权是一项包容广泛的基本人权,是人类有尊严地生活的基本保证。没有全民健康,就没有全面小康。通往民族复兴的伟大征程上,实现全民健康是亿万人民的共同期盼。经过多年探索与不懈奋斗,中国人民健康水平显著提高,一条符合本国国情的健康事业发展道路越走越宽广。从1981年至2016年中国人均预期寿命从67.9岁提高到76.5岁,婴儿死亡率从34.7%。下降到7.5%。居民主要健康指标总体上优于中高收入国家平均水平,提前实现了联合国千年发展目标。中国以健康事业发展的卓越实绩,不仅摘掉了“东亚病夫”的耻辱帽子,还被世界卫生组织誉为“发展中国家的典范”。

(选自《健康中国见证人权进步》,有删改)

材料二:

    人民健康是民族昌盛和国家富强的重要标志。自改革开放以来,人民生活质量显著提高。但与此同时,富足的物质生活导致肥胖问题日益凸显,这一健康隐患引发了社会各界的担忧。2016年,英国著名医学杂志《柳叶刀》的全球成年人体重调查报告显示:全球成人肥胖人口已经超过瘦子,而中国超越美国,成为全球肥胖人口最多的国家。其中,中国男性肥胖人数4320万人,女性肥胖人数4640万人,总人数高居世界第一。另一方面,根据国家统计局和国家卫计委的数据显示,中国人的超重率和肥胖率均不断上升。从1992年到2015年,超重率从13%上升到30%,肥胖率从3%上升到12%。

    中国成年人和儿童青少年肥胖率均在上升。对于肥胖和超重的青少年来说,饮食习惯仍然是影响体重的重要原因。首先,不吃早饭。调查显示,随着年龄增长,青少年吃早饭的比例在逐渐降低:7-12岁青少年吃早饭比例可达95.7%,但16-18岁的青少年吃早饭比例则下降到了90.7%;其次,爱吃夜宵。吃夜宵的人随年龄的增长比例提升:7-12岁青少年吃夜宵比例只有9.7%,但16-18岁青少年则高达23.8%。常吃宵夜的孩子摄入的热量难以消耗、容易引起脂肪堆积,长时间则引起肥胖。

(选自《十九大首次提出健康中国战略以应对日益凸显的国民肥胖问题》,有删改)

材料三:

    “上工治未病”,加快推进健康中国建设,必须坚持预防为主,重视重大疾病防控,重视少年儿童健康,重视如幼、老年人、残疾人矿流动人口、低收入人群等重点人群健康,倡导健康文明的生活方式,营造绿色安全的健康环境,树立大卫生、大健康的观念,把以治病为中心转变为以人民健康为中心,关注生命全周期、健康全过程,全面提高人民健康水平。加快推进健康中国建设,必须全面深化医药卫生体制改革。要继续推进基本医疗卫生制度建设,努力在分级诊疗制度、现代医院管理制度、全民医保制度、药品供应保障制度、综合监管制度等制度建设上取得突破。要大力推动中医药振兴发展,发挥中医药在治未病、重大疾病治疗、疾病康复中的重要作用,建立健全中医药发展的政策举措、管理体系,推进中医药科技创新。要充分发挥广大医务人员积极性,从提升薪酬待遇、发展空间、执业拜境、社会地位等方面入手,增强医务人员职业荣誉感,营造全社会尊医重卫的良好风气。

(选自《建设健康中国需全面深化医药卫生体制改革》,有删改)