搜题请搜索小程序“爱下问搜题”
问题 名词解释

自然选育

答案

参考答案：

也称自然分离，是指对微生物细胞群体不经过人工处理而直接进行筛选的育种方法，又称为单菌落分离。主要作用是对菌种纯化以获得遗传背景较为均一的细胞群体

单项选择题

The clinic nurse is instructing a group of parents about emergency treatment for accidental poisoning and injury. Which of the following statements by one of the mothers indicates that she needs further instruction

A. "I should flush my child’s eye with room temperature tap water for 15 to 20 minutes if a caustic material gets into it. "
B. "I should save the emesis if my child vomits. "
C. "I should call the poison control center if there are any symptoms. "
D. "I should give 2 to 5 teaspoons of clear fluids after administering ipecac. \
查看答案
单项选择题

“民齐者强”。改革关系人民利益，需要统筹各方诉求。正如中央领导同志所言：把“最大公约数”找出来，在改革开放上形成聚焦，做事就能事半而功倍。这体现了（）

①价值判断和价值选择具有历史性特征

②人民群众是历史的创造者

③必须首先考虑并满足最大多数人的利益要求

④辩证否定的实质是“扬弃”

A.①②

B.②③

C.②④

D.③④
查看答案