皮皮学,免费搜题
登录
搜题
【单选题】
在反相键合色谱法中固定相与流动相的极性关系是
A.
固定相的极性>流动相的极性
B.
固定相的极性
C.
固定相的极性=流动相的极性
D.
不一定,视组分性质而定
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【单选题】生物分类的等级按从大到小的顺序是
A.
种属科目纲门界
B.
界门纲目科属种
C.
种属科目门纲界
D.
种属目科门纲界
【单选题】听力原文: St. Valentine's Day has roots in several different legends that have found their way to us through the ages. One of the earliest popular symbols of the day is Cupid, the Roman god of love, who i...
A.
3.
B.
4.
C.
5
D.
6
【判断题】F值是特定温度条件下的热力致死时间
A.
正确
B.
错误
【单选题】Pressed from his parents, and ________ that he has wasted too much time, the boy is determined to stop playing video s. [     ]
A.
realizing
B.
realized
C.
to realize
D.
being realized
【简答题】任务型阅读:根据短文内容,填写下列各题。 John is an American boy. His family is in China now. John likes chocolates(巧克力) very much. But his mother doesn’t give him any. They are not good for him, she thinks. But John has...
【单选题】(48130)三角坑指一定间距(2.5m基长)的()水平差。
A.
两组
B.
一组
C.
三组
D.
四组
【简答题】阅读理解。 In the small town of St. Petersburg during the mid to late 1800's, lived a boy named Tom Sawyer. He is a clever and naughty boy who doesn't have many friends. Will Tom make good choices and find...
【单选题】OO技术中,存储和操作的基本单位是( )
A.
记录
B.
C.
对象
D.
字段
【简答题】根据短文内容,判断正(T)误(F)。 Xiao Ming is a middle school student. He is a good boy, and he studies very hard. But his family is very poor, because his mother got ill a few years ago, and his father has no job....
【判断题】《旅行社条例》使用于中华人民共和国境内的旅行社经营活动。( )
A.
正确
B.
错误
相关题目: