【单选题】【消耗次数：1】
反相键合相色谱分离一化合物，若化合物分子中引入极性基团，则该化合物的K值
①
增加
②
减小
③
不变
④
无法判断
参考答案：
复制
纠错
相关题目
【单选题】
反相键合相色谱分离一化合物，若以乙腈-0.4%乙酸为流动相，减小乙腈的比例，则该化合物的容量因子K值和保留时间tR
①
K增加，tR减小
②
K减小，tR减小
③
K增加，tR增加
④
K减小，tR增加
随机题目
【简答题】
Translate the following sentence into English.多亏了一系列的新发明,现在的医生能够成功地治疗这种疾病了。
【简答题】
Translate the following sentence into ChinesePeople gain fortunes not only by hard labor but also by honesty.
【简答题】
Translate the following sentence into English.他没有努力学习功课，否则的话，他可以通过考试。
【简答题】
Direction: Fill in the blanks with thephrases given below. Change the form if necessary.[sell out; in other words; consist of; stand for; rely on; demand for; engage in; at hand; yield to; confront with]10. Id just like to move to a neighborhood where I wouldnt have to see all the problemsIam[填空1]every day.
【简答题】
Direction: Fill in the blanks with the words given below. Change the form if necessary.[expand; abuse; knowledge; narrative; plantation; property; oppressive; extremely; rebel; abolitionist]4. Tell someone (particularly children) to do the opposite of what you really want, and they will[填空1]and actually end up doing what you want.
【简答题】
Direction: Fill in the blanks with the phrases given below. Change the form if necessary.[collide with; take hold of; for a moment; head for; ever since; be full of; share with; make fun of]6. We saw him[填空1]us, so we stepped aside.
【简答题】
<img src="https://huaweicloudobs.ahjxjy.cn/E5F6AEB6B05D2A517816B38FEA9CEE81.png" title="2.png" alt="2.png"/>
【简答题】
<img src="https://huaweicloudobs.ahjxjy.cn/AE6FDED453ABE6EF485D55EACD6A5CED.png" title="5.png" alt="5.png"/>=[填空1]
【简答题】
Translate the following sentence into English.在他开始欧洲之行之前，我们希望他旅途愉快。
【简答题】
Translate the following sentence into ChinesePrejudice against women violates the fundamental principle that all people are created equal.