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【单选题】
The main resistance to pulmonary ventilation isA.
thoracic elastic resistance
B.
airway resistance
C.
surface tension
D.
intrapleural pressure
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举一反三
【单选题】I often visit my parents, who live in the countryside whenever ____.
A.
I am convenient
B.
it will be convenient to me
C.
I will be convenient
D.
it is convenient to me
【单选题】图示电路中，N为含源线性电阻网络，其端口伏安特性曲线如图(b)所示，其戴维南等效电路参数为( )。
A.
Uoc=-12V，R0=-3Ω
B.
Uoc=-12V，R0=3Ω
C.
Uoc=12V，R0=3Ω
D.
Uoc=12V，R0=-3Ω
【单选题】参见图示。两交换机已形成Trunk链接,并已配置了VTP,但在SWA上新增加VLAN后SWB上未能收到,而屏幕不断出现下图所示的提示信息,这说明了什么原因?
A.
两交换机的VTP模式配置不一致
B.
两交换机的VTP密码配置不一致
C.
两交换机的VTP域名配置不一致
D.
两交换机的VTP版本配置不一致
【单选题】I often visit my parents, who live in the countryside whenever_______.
A.
I am convenient
B.
it is convenient to me.
C.
I will be convenient.
D.
it will be convenient to me.
【简答题】图所示电路中N为含源线性电阻网络。当S断开时，U ab =12V；当S合上时，U ab =14V。求N的戴维南等效电路。
【单选题】—Who do you often go to see Beijing Opera ___________? —My parents. [ ]
A.
for
B.
to
C.
in
D.
with
【简答题】Parents who smoke often open a window or turn on a fan to clear the air for their children, but experts now have identified a related threat to children's health that isn't as easy to get rid of: thir...
【简答题】Parents who often punish their children ___have less patience.
【单选题】参见图示。两交换机已形成Trunk链接,并已配置了VTP,但在SWA上新增加VLAN,SWB上未能收到,其可能的原因是?
A.
SWA的配置版本比SWB低
B.
SWB的域名与SWA的不一致
C.
SWA的修剪模式没有启用
D.
SWB的修剪模式没有启用
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