【单选题】进行醋酸纤维素膜电泳分离人血清蛋白时,下列下列哪个步骤是错误的( )
B.
滤纸桥与支架之间、薄膜与滤纸之间都不能有气泡。
C.
血清蛋白在 pH8.6 的缓冲液中向正极泳动。
【简答题】The writer tries to be humorous in the article. Here are some
quotes from the article; some of them are just told in “ a matter of fact ” tone, while others
sound humorous.Which of them do you think a...
【单选题】张某,腹泻待查收入院,医嘱要求禁食,静脉输液维持营养。今晨输液时,患者输液部位出现静脉炎,下列措施不正确的是
【单选题】昆虫的不完全变态发育没有“蛹”这一阶段,下列哪一类昆虫的发育属于不完全变态发育?( )
【单选题】张某,腹泻待查收入院,医嘱要求禁食,静脉输入维持营养,今晨输液时病人主诉,右侧肢体疼痛。护士发现这两天的输液部位出现红肿。下列护理措施不妥的是:
【简答题】根据首字母提示及句意填入适当的单词。 1. Do you think that he had e_____ to go there? 2. AIl the young people have different d_____. 3. Why not c_____ going to Suzhou instead? 4. The man wanted to cross the P_____. It i...
【简答题】Is____ true that the famous scientist will give us a lecture next week? A that B it C his D he 2.It has not been decided ___ they will leave for New York. A. when B why C tha...
【简答题】蛋白质主要由C、H、O、N等元素组成,其中N的质量分数为16%.因此测定奶制品中N的含量就可以知道奶制品中蛋白质的含量.有不法商人在奶制品中加入三聚氰胺 (C 3 H 6 N 6 )以“提高”其中N的含量. (1)三聚氰胺中N的质量分数为______.(结果保留一位小数) (2)加入1g三聚氰胺,就N的含量而言“相当于”多少克蛋白质?(结果保留一位小数)
【单选题】张某,腹泻待查收入院,医嘱要求禁食,静脉输入维持营养。今晨输液时,病人输液部位出现静脉炎,下列措施不正确的是