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【简答题】
画相量图时，串联电路可以______作为参考相量，并联电路可以______作为参考相量。
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反馈参考答案：
举一反三
【多选题】科研不端是一个老问题，也是一个全球性的问题。近几年来，韩国首尔大学教授黄禹锡干细胞造假、日本东京大学教授多比良基因研究造假等一系列造假事件纷纷。当前。我国正处于剧烈的经济社会转变之中，科研不端之势也呈上升之势。中国科协进行的一项调查表明，近三成科技工作者认为其周围存在严重的学术不端行为，其中尤以抄袭和剽窃他人成果、伪造数据或弄虚作假、技术成果交易中夸大技术价值或隐瞒技术风险三种行为最为普遍。像“汉...
A.
努力钻研专业知识
B.
勇于创新、坚忍不拔
C.
要有端正的学术态度
D.
实事求是、一丝不苟
【简答题】The author compares our memory first to 'file cabinets' (Paragraph 5) and then to an 'ever-green tree' (the last paragraph). This special comparison is known as
【简答题】One of the most common types of core – spun yarns is that involving a core of ( ) such as spandex with a covering of ( ) .
【单选题】"i"在"cabinets"中如何发音? 公司 cabinets
A.
[ ɔ ]
B.
[ i ]
C.
[ wa ]
D.
[ j ]
E.
[ u ]
F.
[ y ]
G.
[ ɥ ]
【简答题】简述补体的功能。
【单选题】Which of the following statements is true regarding hoods/cabinets?
A.
Laminar flow hoods, chemical fume hoods and biological safety cabinets (BSC) can be used interchangeably
B.
A laminar flow hood maintains inward airflow and may be used for work with infectious materials
C.
Chemical fume hoods are HEPA filtered
D.
Biological safety cabinets use HEPA filters and directional airflow to protect both the worker and materials being used
E.
All of the above
【判断题】Core – spun yarns involves a core of a stretch filament such as spandex with a covering of staple fibers.
A.
正确
B.
错误
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