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【简答题】
由时间常数公式可知, RC 一阶电路中, C 值一定时, R 值越大过渡过程进行的时间越 ; RL 一阶电路中, L 值一定时, R 值越大过渡过程进行的时间越
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反馈参考答案：
举一反三
【判断题】If you install powerful firewalls, you can even keep determined hackers away.
A.
正确
B.
错误
【单选题】You will find as you read this book that you just can't keep some of these stories to ___. You will want to share them with a friend.
A.
itself
B.
yourself
C.
himself
D.
themselves
【单选题】患者,男性,40岁,面色灰暗,颈部及胸部有蜘蛛痣,近期反复牙龈出血。查:血红蛋白80g/L,白细胞4.0×109/L,血小板60×109/L,肝功能ALT<40U,白蛋白36g/L,球蛋白35g/L。出血原因最可能是
A.
凝血因子减少
B.
造血功能障碍
C.
营养不良
D.
过敏反应
E.
肝硬化
【单选题】You'd better keep in mind that ______.
A.
you can act as you like in any country
B.
you can act in the same way even in different countries
C.
people are indifferent to what good manners are
D.
When in Rome, do as the Romans do
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