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【单选题】
发现法是由（ ）提出来的。A.
赫尔巴特
B.
C.
洛扎诺夫
D.
夸美纽斯
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皮皮学刷刷变学霸
举一反三
【单选题】Regarding the activities of DSC control unit when a message is received, which is false?
A.
When receiving DSC messages other than a distress， urgency and safety call， the control unit is able to provide for an automatic transmission acknowledging the call received.
B.
The information contained in the DSC message is decoded and displayed on the front panel
C.
The information may be stored in an internal memory
D.
The information may be stored in floppy disks.
【简答题】Encryption (加密) should be used when a secret message is online.
【判断题】Spellings are not important when the message is to be sent to a stranger.
A.
正确
B.
错误
【单选题】Encryption should be used when a secret message is _____ online.
A.
developed
B.
delivered
【单选题】38Encryption should be used when a secret message is ____ online.
A.
derived
B.
deprived
C.
defined
D.
delivered
【单选题】Encryption should be used when a secret message is _____ online.
A.
contacted
B.
submitted
C.
delivered
D.
amazed
【单选题】Encryption should be used when a secret message is ____ online.
A.
derived
B.
deprived
C.
defined
D.
delivered
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