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【单选题】
由555定时器构成的施密特触发器,其接通电平 V+ 为 2/3Vcc,断开电平 V- 为 1/3Vcc, 则触发器的回差 电压 △V为 。
A.
2/ 3Vcc
B.
1/3 Vcc
C.
Vcc
D.
3 Vcc
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【单选题】在转基因产品标识管理中,欧盟规定转基因标识的阈值为()。
A.
0.9%
B.
1%
C.
2%
D.
5%
【判断题】一种优良的精馏塔,应该有较高的分离效率、较大的处理通量、较宽的操作弹性。
A.
正确
B.
错误
【判断题】一种优良的精馏塔,应该有较高的分离效率、较大的处理通量、较宽的操作弹性。
A.
正确
B.
错误
【单选题】News report 3--- 1. What does the study show about Generation Y? [音频]
A.
They occupy over a third of the Indian workforce.
B.
They are graduates from top colleges.
C.
They are keen on starting their own business.
D.
They love work of designing fashionable clothes.
【简答题】这是章节3.3news report1 原文材料,把空格处的单词补充完整。 请完成学习通章节上的听力选择题后再来作答此题。 Kerala, the southern state of India, is said to have __1___ a “fat tax” in a bid to take serious action against obesity (肥胖) . In its new ...
【判断题】写C程序时,一行可以写一个语句或几个语句,每个语句的结尾处须用“;”符号。
A.
正确
B.
错误
【单选题】关于“智能家电”,下列说法错误的是______。
A.
“智能化”使得电视机开始具备五大交互功能,包括手势识别、人脸识别、语音识别等
B.
智能家电是指采用一种或多种智能化技术,并具有一种或多种智能特性的家用和类似用途电器
C.
市面上的智能洗衣机可以按设计者规定的时间、模式、程序运行,实现了智能控制
D.
通过对家电智能特性检测与评价,将家电“智商”分为5级,即1级至5级,1级为最高级
【简答题】每个C语句以( )为结尾
【单选题】[音频] News report 3--- 1. What does the study show about Generation Y?
A.
They occupy over a third of the Indian workforce.
B.
They are graduates from top colleges.
C.
They are keen on starting their own business.
D.
They love work of designing fashionable clothes.
【单选题】News report 3--- 1. What does the study show about Generation Y?
A.
They occupy over a third of the Indian workforce.
B.
They are graduates from top colleges.
C.
They are keen on starting their own business.
D.
They love work of designing fashionable clothes.
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