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【单选题】
放大电路如下图所示,该电路中引入了直流负反馈,反馈元件是 。A.
R b1
B.
R b2
C.
R E
D.
R C
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反馈参考答案：
举一反三
【单选题】Choose the best topic sentence for the following paragraphs. Note that there is one extra sentence which you do not need to use.Interviewers spend all day listening to answers to the same set of quest...
A.
Your face should be open and friendly, inviting conversation from the interviewer.
B.
Small details, such as posture, or the way you hold your head, have a greater impact than you can imagine.
C.
One interviewer we surveyed said she pays a lot of attention to a candidate’s body language.
D.
Candidates should keep their answers to the point, without being monosyllabic
【单选题】实验测定配离子 [Zn ( NH 3 ) 4 ] 2+ 的磁矩为零,则中心离子的杂化轨道类型和配离子的空间构型为
A.
dsp2杂化形成正方形
B.
sp3杂化形成四面体
C.
sp3杂化形成正方形
D.
dsp2杂化形成四面体
【单选题】接到客人要求取消 “ 请勿打扰 ” 通知后 , 话务员应立即开通电话 , 并在交班记录本上注明 ( )
A.
取消符号
B.
取消时间
C.
取消符号及房号
D.
取消符号及时间
【单选题】关于冰淇淋的膨胀率说法正确是
A.
冰淇淋的膨胀率是评价冰淇淋品质的重要指标之一，膨胀率越高，品质越好
B.
乳脂肪含量高，混合料黏度越大，越有利于膨胀
C.
适量的稳定剂，能提高膨胀率
D.
无机盐含量越高，越有利于提高膨胀率
【简答题】市场补缺者通过生产和提供某种具有特色的产品和服务赢得发展的空间,甚至可能成为()
【单选题】Mike arrives at his class after the students and teacher have already begun discussing the topic for the day. Mike doesn’t make any contributions during discussion. Based on what you know, which of th...
A.
He was late getting to class.
B.
He hadn’t read the assignment so he couldn’t contribute.
C.
Class began before Jed arrived.
D.
He doesn’t make any contribution during discussion.
【单选题】Which topic doesn’t belong to “logical division of ideas”?
A.
types of books
B.
qualities of a good boss
C.
my dormitory
D.
advantages of living on campus
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