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【判断题】
介质的相对介电常数描述了电介质在外电场中的极化程度的大小。
A.
正确
B.
错误
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举一反三
【单选题】5G 时代即将到来。作为新一代移动技术 , 5G 具有高速度、低时延、低功耗的特点 , 将万事万物以最优的方式连接起来。这一全新技术 ( ) 1 是人类实践活动的产物 2 将改变事物之间本质联系 3 是对以往技术的彻底否定 4 将推动社会生产力的发展
A.
. ①③
B.
. ①④
C.
. ②③
D.
. ②④
【单选题】The project manager is working to clearly describe the level of involvement expected from everyone involved in the project in order to prevent rework,conflict,and coordination problems.Which of the fo...
A.
Develop Project Management Plan and Plan Quality.
B.
Problem solving,control,and discovering gold platin
C.
Verify Scope and Control Quality.
D.
Monitor and Control Risk.Develop Project Team,and Lessons Learne
【单选题】Tom is a _______ person. He thinks no one can be successful without ________.
A.
hard-working, hard work
B.
hard-working, work hard
C.
working-hard, hard work
D.
working-hard, work hard
【单选题】To get an education, _________.
A.
working hard is very important
B.
working hard is needed
C.
one must work hard
D.
it is needed to work hard
【多选题】移动通信的发展不仅改变生活也影响着社会,4G让人们进入( )、而5G让人们进入( )。
A.
模拟时代
B.
数字时代
C.
移动互联网时代
D.
万物互联时代
【单选题】关于条件反射的叙述,正确的是()
A.
通过后天学习和训练而形成
B.
不需要非条件反射为基础
C.
数量有限而且比较固定
D.
属低级的反射活动
E.
主要中枢部位在脑干
【单选题】Mary is a good student. She is . [     ]
A.
working hard girl
B.
a working hard girl
C.
hard-working
D.
a working-hard girl
【单选题】It is ______ to improve the working conditions for the construction workers.
A.
worthwhile
B.
worth
C.
worthy
D.
worthy of
【单选题】It is said in the passage that when the economy slides______.
A.
men would choose working women as their marriage partners
B.
more women would get married to seek financial security
C.
even working women would worry about their marriages
D.
more people would prefer to remain single for the time being
【单选题】首届世界5G大会消息,在全球5G标准必要专利声明中,来自我国企业的占34%,居全球首位。这说明了( ) 1我国坚持创新驱动,敢于创新、善于创新 2科技改变生活,创新引领未来 3企业是社会创新的重要力量 4我国的5G与其他科技水平都全面全面超越发达国家
A.
①②③
B.
②③④
C.
①③④
D.
①②④
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