(单选题)3: 下列不属于电子邮件协议的是 ( ) A: POP3 B: SMTP C: SNMP D: IMAP4 ...
(单选题)22: The game will take place _____ June 2nd. A: on B: at C: in D: during ...
(单选题)4: He made a(n) ___ appearance and took up two hours out of my limited time. A: shock B: unexpected C: expecting D: astonishing ...
(单选题)23: "I had to walk home yesterday: I had no money for my fare.""You______ me l I could have lent you the money!" A: ought to tell B: must have told C: must tell D: should have told ...
(单选题)17: I needn't have taken a taxi. I______, it was only a hundred meters. A: could walk B: should walk C: could have walked D: ought to walk ...
(单选题)18: Visitors _____ Beijing are sure to see the Summer Palace. A: for B: to C: on D: from ...
(单选题)20: 电力系统的负荷是指电力系统中所有用电设备消耗的功率,电力系统的负荷应是()。 A: 有功功率 B: 有功功率和无功功率 C: 无功功率 ...
(单选题)10: 变压器温度计指示的变压器顶层油温,一般不得超过( )。 A: 75℃ B: 80℃ C: 95℃ ...
(单选题)18: 在电路的任一回路中,电压升与电压降( ) A: 之和等于零 B: 代数和等于零 C: 相等。 ...
(单选题)4: 开机后SP指针的指向是( )单元。 A: 00H B: 07H C: 08H D: 1FH ...