A.An identifier
B.A string
C.An array
D.A program
[单选题]______ is a sequence of letters and digits, the first character must be a letter.A.An identifierB.A stringC.An arrayD.program
[单选题] (75) is a sequence of letters and digits,the first character mustbe a letter.(75) A.An identifierB.A stringC.An arrayD.program
[单选题]is a sequence of letters and digits, the first character must be a letter.A.An identifierB.A stringC.An arrayD.program
[单选题]A.n identifier is a sequence of letters and digits,the first character must be(60).A.a letterB.a stringC.an arrayD.a interger
[单选题]is a device that converts images to digital format.A.CopierB.PrinterC.ScannerD.Display
[单选题]Which channel is designated for VHF Digital Selective Calling?A.Channel 70B.Channel 06C.Channel 13D.Channel 16
[试题]Tospeedupthe______ofletters,thePostOfficeintroducedautomaticsorting.A.)treatmentB)deliveryC)transmissionD)departure
[名词解释] 查询序列(query sequence)
[名词解释] 互补序列(complementary sequence)
[名词解释] SRS(sequence retrieval system)