【单选题】【消耗次数:1】
夜盲症可能是由于缺乏( )。
维生素A
维生素D
维生素B1
维生素B2
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相关题目
【判断题】 维生素A是水溶性维生素,维生素B2是脂溶性维生素。
①  正确
②  错误
【单选题】 与夜盲症有关的维生素是( )。
①  维生素A
②  维生素B1
③  维生素D
④  维生素C
【单选题】 患有“夜盲症”的人可能是体内缺乏维生素( )。
①  A
②  B
③  C
④  D
【单选题】 人体缺乏下列哪种维生素,会引起夜盲症()
①  维生素A
②  维生素D
③  维生素E
④  维生素K
⑤  维生素B<sub> 2</sub>
【单选题】 下列哪种维生素是脂溶性维生素
①  维生素C
②  维生素B2
③  维生素B6
④  维生素B1
⑤  维生素E
【单选题】 维生素包括:水溶性维生素A和C,脂溶性维生素B、D、E、K。
① 
② 
【单选题】 下列哪一种维生素的缺乏会导致夜盲症?
①  维生素A
②  维生素C
③  维生素D
④  维生素B
【判断题】 维生素C用于治疗夜盲症。
①  正确
②  错误
【多选题】 以下维生素中,属于水溶性维生素的是?
①  烟酸
②  维生素B1
③  维生素E
④  视黄醇
【判断题】 反刍动物能合成维生素B和维生素C,所以一般没有维生素缺乏症
①  正确
②  错误
【判断题】 孕期需特别考虑的维生素为维生素A、D、B族。
①  正确
②  错误
随机题目
【多选题】 You speak ____________ you had really been there.
①  as soon as
②  as many as
③  as if
④  as though
【多选题】 I hope I can ________________ soon.
①  make my English better
②  make my English worse
③  improve my English
④  invent my English
【多选题】 _____________ , he began to write a report.
①  Finish the exploration
②  Having finished the exploration
③  The exploration finished
④  The exploration finish
【单选题】 The government enacted new laws to ________________ terrorism(恐怖主义).
①  fight for
②  fight against
③  fight in
④  fight at
【单选题】 Anger is a normal emotion that we all feel from time to time. Some people express anger openly in a calm reasonable way. Some explode with anger, and scream and shout. But other people keep their anger inside. They can not or will not express it. This is called repressing anger. Many doctors think that repressing anger is more dangerous to a person’s health than expressing it. They say that when a person is angry, the brain gives out the same hormones (荷尔蒙) as that are produced during tense and nervous situations. They speed the heart rate and raise blood pressure, so the person feels excited and ready to act. Repressing these feelings will only make the feelings continue, and this can lead to many medical problems. To prevent these problems, these doctors suggest letting the anger out by expressing it freely. But recently some other doctors question this. They say that people who express anger repeatedly and violently become, in fact, more but not less angry. And this could cause medical problems. However, some doctors say that both repressing and expressing anger can be dangerous. They believe that those who express anger strongly may be more likely to develop heart diseases, and that those who keep their anger inside may face a greater danger of high blood pressure. Doctors say the solution is to learn how to deal with anger. The first step is to admit that you are angry and to recognize the real cause of the anger, and then to decide if the cause is serious enough to get angry about. If it is, do not express your anger while angry. Wait until your anger has cooled down, and express yourself calmly and reasonably. Doctors also say that a good way to deal with anger is to find humor in the situation that has made you angry, for laughter is much healthier than anger.What is the main idea of this passage?
①  Anger should be dealt with in a proper way.
②  Different people deal with anger in different ways.
③  Doctors suggest dealing with anger by repressing it.
④  The best way to deal with anger is to laugh when angry.
【单选题】 It is _____________ that today people in some remote areas know about the rest of the world.
①  difficult
②  amazing
③  inferior
④  superior
【单选题】 They dont____________ the importance of this problem.
①  understands
②  understood
③  understanding
④  understand
【单选题】 The people who ____________ cars work very quickly.
①  astonish
②  assemble
③  afford
④  acquire
【单选题】 Tommy: Mommy, when will we have dinner? I’m starving.Mother: __________ We have to wait for Daddy.
①  OK, honey.
②  Quickly, honey.
③  Soon, honey.
④  All right, honey.
【单选题】 He____________ cold and hunger a great deal.
①  escaped from
②  suffered from
③  kept away from
④  came from