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【判断题】
强耦合时,虽然通频带变得更宽,矩形系数也更好,但谐振曲线顶部出现凹陷,回路的调节也比较麻烦,只在与临界耦合级配合特殊场合才采用。A.
正确
B.
错误
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【简答题】国际市场调研的基本方法有哪些?
【简答题】网络市场调研的基本方法有哪些？
【单选题】It can be learned from the 4th paragraph that
A.
mercury and other preservatives in vaccines do harm to children.
B.
autism has something to do with vaccine.
C.
some people are misled about polio vaccine.
D.
people from politics are positive about polio vaccine.
【单选题】在国际国际贸易协调中主要是对（）。
A.
关税和非关税贸易政策以及调整国际贸易关系的协调
B.
主要对国家关系的调整
C.
主要对国际关系的调整
D.
主要联合国成员国关系的调整
【单选题】It can be learned from the 7th paragraph that______.
A.
Feinstein knows what the policy-makers are interested in
B.
both genes and family background affect people's educational development
C.
white-collar parents put more effort on their children's education
D.
early performance test can be wrong in some cases
【单选题】以下关于非服务攻击行为特征的描述中,错误的是()。
A.
对无线传感器网络节点之间的无线通信进行干扰,造成通信中断
B.
攻击EPC中的域名服务(DNS)体系或服务,使RFID系统瘫痪
C.
攻击网关的方法,使得物联网系统瘫痪
D.
攻击路由器、交换机或移动通信基站、AP接入点或无线路由器,导致网络瘫疾
【单选题】Which can NOT be learned from Channel 3 on April 25th, 2009?
A.
Pinyin
B.
English
C.
Japanese
D.
Miao People's language
【单选题】It can be learned from Paragraph Five that______.
A.
8-hour subjects fared the best among three groups
B.
the 6-hour subjects began to decline in the middle of the study
C.
half of the 6-hour subjects fell asleep at the computer
D.
4-hour subjects were more impaired than 6-hour subjects
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