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【简答题】
电路如图所示，开关S原是闭合的．电路处于稳态。若S在t=0时打开，已知U s =2V，L 1 =L 2 =1H．R 1 =R 2 =1Ω。试求t≥0时的i 1 (t)和u L 2 (t)。
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举一反三
【简答题】轮系的功用有哪些?
【单选题】按照《医疗机构药事管理暂行规定》,关于退药的说法正确的是
A.
药品发出后，如果没有开封，可以退换
B.
为维护患者合法权益，发出的药品在保质期内可以退换
C.
为保证患者合法权益，发出的药品经验收并批准后可以退换
D.
为保证患者用药安全，药品一经发出，不得退换
【单选题】Excuse me, Miss Wang, a man named Robert from the Bank of Construction ____ all morning. Could you speak to him now? [ ]
A.
phones
B.
has phoned
C.
has been phoning
D.
was phoning
【单选题】Your network consists of a single Active Directory domain. All servers run Windows Server 2003 ServicePack 2 (SP2). All client computers run Windows XP Professional Service Pack 3 (SP3).Three client c...
A.
In the roaming user profile, rename the ntuser.dat file to ntuser.man.
B.
In the roaming user profile, remove all permissions on the Desktop folder and assign KioskUser the Read permission for the Desktop folder.
C.
On each kiosk, rename the ntuser.ini file to ntuser.man.
D.
On each kiosk, remove all permissions on the Documents and Settings folder and assign KioskUser the Read permission for the Documents and Settings folder.
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