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【简答题】
假定某放大器输入重复频率为2kHz的理想电压，输出端观察到t r =0.1μs，δ=20%的电压波形，试估算该放大器的f L 和f H 。
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【多选题】操纵分动器必须满足( )等条件。
A.
未先接上前驱动桥,不得挂入低档
B.
未先接上后驱动桥,不得挂入高档
C.
未先退出高档,不得摘下后驱动桥
D.
未先退出低档,不得摘下前驱动桥
E.
对无轴间差速器的汽车,使用高速档时不允许接前驱动桥
【简答题】搭配连线。 ( )1. How much is it? ( )2. Here you are ( )3. What do you want? ( )4. When are we going to eat? ( )5. What are you going to do? ( )6. How are you? ( )7. Who can help...
【单选题】When you are going to put out a fire, you ______.
A.
must be careful
B.
should keep air away from it
C.
must know it is dangerous
D.
should cover it with water only
【多选题】操纵分动器必须满足( )等条件
A.
A未先接上前驱动桥,不得挂入低档
B.
未先接上后驱动桥,不得挂入高档
C.
C 未先退出高档,不得摘下后驱动桥
D.
D 为先退出低档,不得摘下前驱动桥
E.
E ADE对无轴间差速器的汽车,使用高档时不允许接前驱动桥
【多选题】操纵分动器必须满足( )等条件
A.
A未先接上前驱动桥,不得挂入低档
B.
未先接上后驱动桥,不得挂入高档
C.
C 未先退出高档,不得摘下后驱动桥
D.
D 为先退出低档,不得摘下前驱动桥
E.
E 对无轴间差速器的汽车,使用高档时不允许接前驱动桥
【单选题】测定停留时间分布常用的方法有脉冲示踪法和阶跃示踪法,关于这两种方法,下列描述不正确的是()。
A.
这两种方法都是物理示踪法;
B.
根据脉冲示踪法得到的实验数据,可以直接得到E函数;
C.
根据阶跃示踪法得到的实验数据,可以直接得到E函数;
D.
根据阶跃示踪法得到的实验数据,可以直接得到E函数。
【简答题】从右栏给左栏中的问句选择恰当的答语。 ( )1. When are you going to go to the airport? ( )2. What are you going to do? ( )3. Is it round? ( )4. What are you doing? ( )5. What's the date? ( )6. Did ...
【单选题】听力原文：W: What's the first thing you are going to do, Charles, when you take over your father's business? M: Pay more attention to market research--find out who needs our goods and why, and then adverti...
A.
The woman expects the man to make an important decision.
B.
The man's father is a very successful banker.
C.
They are both making a future plan.
D.
The man is not going to succeed in his father's business.
【简答题】A. What are you going to do? B. When and where shall we meet? C. Can you come? D. When are you free then? E. What about Sunday? F. What can I do...
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