A.a letter
B.a string
C.an array
D.a interger
[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]______ 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] (67) is a sequence of letters and digits,the first character must be a letter.(67) A.An identifierB.A stringC.An arrayD.A 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 an identifier of a web page。A.ASPB.HTMLC.HTTPSD.URL
[单选题]( )is an identifier of a web page。A.ASPB.HTMLC.HTTPSD.URL
[多选题] Select valid identifier of Java: ()A . userNameB . %passwdC . 3d_gameD . $chargeE . thi
[试题]Tospeedupthe______ofletters,thePostOfficeintroducedautomaticsorting.A.)treatmentB)deliveryC)transmissionD)departure
[单选题]The sequence of fuel injection into cylinders is determined by ().A . the steeringB . the driven gearC . the turning gearD . the timing gear
[单选题]The sequence of parts in a generally used fuel oil supply system for a main engine is ()(1)tanks in the double bottom(2)centrifuges(3)service tank(4)settling tank(5)viscosity regulatorA . (1)-(2)-(4)-(3)-(5)B . (1)-(4)-(2)-(3)-(5)C . (1)-(3)-(2)-(4)-