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【简答题】
一、根据要求写出检索表达式。 1、检索近 10 年来在《石油化工》中发表的精细化工方面的文献。 2、 检索 2003 年以来我校师生共发表了多少篇文章。 二、 写出下面检索表达式的含义 1、 机构 = 清华大学 and 文摘 = 材料化学 and 年 = 2005-2018 2、 基金 = 国家自然科学基金 and 关键词 = 化学添加剂 and 年 =2010-2018
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皮皮学刷刷变学霸
举一反三
【单选题】What is the main idea of this passage? _______
A.
It is not customary to telephone someone in the morning and in sleeping hours in the U.S.
B.
The role of time in social life over the world.
C.
If people are late, they may be regarded as impolite or not fully responsible in the U.S.
D.
Not every country treats the concept of time as the same.
【简答题】III. Mark each statement true (T) or false (F). (2 points for each, 12 points in all.) 1. It is common for an American to marry a person from a different ethnic background.________ 2. Americans usuall...
【单选题】What is the main idea of the passage?
A.
The role of time in social life over the world is different.
B.
If people are not prompt, they may be regarded as impolite or not fully responsible in the U.S.
C.
It is not customary to telephone someone in the morning and in sleeping hours in the U.S.
D.
Not every country treats the concept of time as the same.
【单选题】为病人做药物过敏试验时,最重要的准备工作是:
A.
环境要清洁、宽阔
B.
备好70％乙醇及无菌棉签
C.
抽药剂量要准确
D.
询问病人有无过敏史
E.
选择合适的注射部位
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