【判断题】【消耗次数:1】
保留体积与流速以及保留时间变化有关。
正确
错误
参考答案:
复制
纠错
相关题目
【单选题】 下列有关条约保留的说法不正确的是
①  保留一般不可以随时撤回
②  保留的目的在于免除公约的某些条款对当事方的适用效力或修改某些条款
③  提出保留的依据在于国家主权
④  保留是一种单方法律行为
【多选题】 前列腺NVB保留技术保留的程度分为()
①  A.完全
②  B.外侧
③  C.内侧
④  D.部分
【多选题】 前列腺NVB保留技术保留的侧别分为()
①  A.内侧
②  B.外侧
③  C.一侧
④  D.双侧
【单选题】 在气相色谱中,直接表征组分在固定相中停留时间长短的保留参数是
①  保留时间
②  调整保留时间
③  死时间
④  相对保留值
【单选题】 在反相键合相色谱法中,若以甲醇-水为流动相,增加甲醇的比例时,组分的容量因子k与保留时间tR将有何变化
①  k与tR增大
②  k与tR减小
③  k减小,tR
④  k增大,tR减小
【单选题】 保留金的退还规定是()。
①  质量保修期满一年后,一次性退还
②  工程移交时,一次性退还
③  工程移交时,支付一半;质量保修期满后,另一半保留金将由工程师开具证书付给承包商。
④  不予退还
【判断题】 两组分保留时间之差越大且色谱峰越窄,分离效果越好。
①  正确
②  错误
【判断题】 在气相色谱中,相对保留值只与柱温和固定相的性质有关,与其它操作条件无关。
①  正确
②  错误
【单选题】 保留入学资格期限最长为
①  1
②  2
③  3
④  4
【单选题】 下列哪个条约可以适用保留?
①  《中日友好条约》
②  《维也纳外交关系公约》
③  《联合国宪章》
④  《联合国海洋法公约》
随机题目
【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
【单选题】 Youdonthavetobeinsuchahurry,Iwouldratheryou________onbusinessfirst.
①  wouldgo
②  willgo
③  went
④  havegone
【单选题】 He____________ her out of her money.
①  chatted
②  changed
③  cheated
④  chose
【单选题】 Now it is illegal (非法的) to kill ______________ for their ivories.
①  tigers
②  lions
③  elephants
④  birds
【单选题】 Will you please____________ the experiment youve just made?
①  repeat
②  recover
③  renew
④  reform
【单选题】 It is necessary____________ the book immediately.
①  for him to return
②  that he return
③  his returning
④  to him return
【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.One correct way to deal with anger is to __________.
①  say nothing no matter how angry you are
②  express anger openly and freely right away
③  express your anger immediately but calmly
④  think about whether its worth getting angry
【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.Some doctors argue that people who often let the anger out would become __________.
①  stronger
②  more violent
③  angrier
④  more dangerous
【单选题】 They drew different ______________ from the facts.
①  attentions
②  examinations
③  decisions
④  conclusions