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【单选题】
频率稳定性能最好，频率范围最宽的正弦波振荡器为（）A.
DDS振荡器
B.
石英晶体振荡器
C.
RC振荡器
D.
LC振荡器
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反馈参考答案：
举一反三
【简答题】697÷（142×3-385）
【简答题】某公司想创一个适合年轻女性的服装品牌,需要了解年轻女性的穿衣偏好、消费能力等,需要做哪些内容的调查?
【单选题】物理学家福尔顿，由于研究工作的需要，测量固体氨的热传导系数。由于他采用的是一种新的测量方法，测出的数值比过去公认的理论计算出来的数值高出500倍。福尔顿大吃一惊 他迟疑了一阵，决定把这个结果束之高阁，没有告诉别人，也没有继续研究下去。没有多久，一位年轻的科学家在实验中也测出了和福尔顿相同的结果，而且把结果公布了出去，同时，在此基础上发明了一种新的测量热传导系数的方法。由于这位科学家的数据和方法真实...
A.
学会拒绝
B.
尝试做第一人
C.
从共性中寻找个性
D.
在个性中求取共性
【单选题】This is supposed to be an enlightened age, but you wouldn't think if you could hear what the average man thinks of the average woman! Women won their independence years ago. After a long, bitter strug...
A.
It is not really an enlightened age.
B.
It is different from an enlightened age.
C.
It is the same as an enlightened age.
D.
It is like an enlightened age.
【单选题】This is supposed to be an enlightened age, but you wouldn't think so if you could hear what the average men think of the average women. Women won their independence years ago. After a long, biter stru...
A.
Women's struggle for recognition has been completely won.
B.
Women have proved their abilities in many fields.
C.
Women can not get the same educational opportunities as men.
D.
Women are now regarded as equal to men all over the world.
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