皮皮学，免费搜题
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【单选题】
下面是某学生对课本中图表资料的使用情况，其中不正确的是（ ）A.
利用金属活动性顺序，判断金属与盐酸能否发生反应
B.
利用元素的相对原子质量表，查出元素的化合价
C.
根据溶解度曲线图，判断某物质在一定温度下的溶解度
D.
根据酸、碱、盐的溶解性表，判断某些复分解反应能否进行
拍照语音搜题，微信中搜索"皮皮学"使用
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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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