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为了避免重复劳动，提高科学研究的效益，必要的工作是
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为了避免重复劳动，提高科学研究的效益，必要的工作是
A、选定课题
B、课题论证
C、文献检索
D、历史分析
时间：2021-09-01 16:15
关键词：
安徽教育在线
阜阳师范大学
学前教育
答案解析
C
相关问题
boost的意思是:help or encourage to increase or improve
eloquent的意思是:fluent or persuasive in speaking or writing
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
为了避免重复劳动,提高科学研究的效益,必要的工作是( )
为了避免重复劳动，提高科学研究的效益，必要的工作是
最新问题
一项关于吸烟与肺癌关系的病例对照研究，研究结果表明OR为4.0，其意义是（）
Mainly east 3 or 4 partly cloudy to overcast occasional rain（）slowly south moderate or good.
病例对照研究进行统计性推断时不匹配分层资料总的OR值计算公式是
（）any case or suspected case of quarantinable disease，or any case of eruptive disease or any death be discovered，the local quarantine officer must be notified immediately．
Should any case or suspected case of quarantinable disease，or any case of eruptive disease or any death be discovered，the local Quarantine Officer must be（）immediately.
Masters are（）solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.
If he is a common carrier，he is absolutely responsible to the owner of the goods carried （）any loss or damage to them unless caused by an Act of God or the Queen’s enemies，or the inherent vice in the goods themselves，or the negligence of the owner of the goods，or a general average sacrifice.
系统中雷达状态包括Unknown、Operational（or ON）、Failed（or OFF）、Detached。
Owners are to be responsible for loss of or damage to the goods or delay in delivery of the goods only in case the loss，damage or delay has been caused by the improper or negligent stowage of the goods．This means that（）.
The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire，（）the claimant proves that the fire arose from fault or neglect on the part of the carrier，his servants or agents.
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