【单选题】If we can____ourpresent difficulties, then everything should be all right. [ ]
【单选题】– Can you come to my birthday party? – I’m sorry, ______ I can’t come.
【单选题】R、L、C串联电路中,在电感L上再并联一个电阻R1,则电路的谐振频率将( )。
【判断题】牢固树立战斗力这个标准是建设世界一流军队的唯一根本标准。
【单选题】I hope ________my birthday party next Saturday.
【单选题】You can come now ______ you can meet us at the supermarket later.
【单选题】I hope you ______ tomorrow [ ]
【单选题】—Can you guess if they ________tomorrow? —They will come if they ________free, I think.
【单选题】R、L、C串联电路中,在电容C上再并联一个电阻R1,则电路的谐振频率将( )。