【单选题】我国对资本主义工商业的社会主义改造采取从低级到高级的( )的过渡形式。
【单选题】We learn from the text that twenty years ago, Christine______.
A.
started her hobby by collecting magazines
B.
had a lot of girlfriends visiting her
C.
was worried about her marriage
D.
was in an unhappy marriage
【单选题】电路如图所示,若电流源的电流值为3A, 则电压U的值是:
【简答题】电路如图所示,电源是220V工频交流电,若变压器的原副线圈匝数比为10:1,则电感两端的电压有效值是( )V,流过电感的电流有效值是( )A,电感在电路中的感抗是( )Ω。(保留到个位)
【单选题】Study must be linked closely ____ pratice.
【简答题】How to identify large numbers in listening pratice?
【单选题】The teacher told me to pay more attention_______ my pronunciation, so I made a_______ to pratice it every day.
【单选题】我国对资本主义工商业的社会主义改造采取从低级到高级的( )过渡形式。
【判断题】Susan wanted to pratice swimming.
【简答题】如图 9. 1 所示电路中,若电源电压有效值为 220 V ,则不导通的二极管所承受的反向电压最大值为 V 。