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【简答题】
电路如图T1.6所示，已知T 1 和T 2 的饱和管压降|V CES |=2V，直流功耗可忽咯不计。回答下列问题： (1)R 3 、R 4 和T 3 的作用是什么？ (2)负载上可能获得的输出功率P om 和电路的转换效率η各为多少？
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【单选题】下列关于施工质量控制的说法，错误的是（）。
A.
施工准备质量控制是指工程项目决策阶段的施工准备
B.
施工准备质量属于工作质量范畴
C.
施工过程的质量控制的内涵包括全过程施工生产及其中各分部分项工程的施工作业过程
D.
施工验收质量控制是指对工程产品质量控制
【单选题】Peter: ______ Diane: No, not all memories are correct, but they all tell us something about the person who is doing the remembering. The memory may tell us what the person likes or dislikes, what he o...
A.
Are all memories accurate? What kind of things are easier for people to remember?
B.
Are there different kinds of memory? What makes it easier for people to remember certain things?
C.
What makes it easier for people to remember certain things? Are all memories accurate?
D.
What aspects of brain biology interest you? Are all memories accurate?
【单选题】What does the passage tell us about gun dogs?
A.
They are the fastest runners of all dogs.
B.
Their teeth are removed when they are young.
C.
They can carry birds, etc. without hurting them.
D.
They breed well, producing many young dogs.
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