Correction Output Part (30") Part (30) Part (15" FunctionTotal score 1. Single Selection: Select the answer according to the question: (2*15-30") 1 The computer languages may be divided into three general types, which do NOT include: A. Machine languages C. High-level languages B. Assembly languages D. Object-oriented languages 2)In the following statements about variable, which is INCORRECT? A. All variables must be defined before they are used. B. All variables must be given a type when they are defined. C. Every variable has an address and a value D. The variable name can be started by letters, digits or underscores 3)Which of the follows is NOT required to realize the repetition structure by loop variables: A. At least one statement to print this variable. B. An initial value for loop variable. C. A given condition about loop variable D. At least one statement to vary the loop variable. 4) Which of the follows is NOT suggested in structured programming:: A. Selection structure C. Jump structure B. Repetition structure D. Sequence structure 5) In the following statements about expression, which is INCORRECT? A. There is a range limitation to express one integer in C language. B. The char type is actually one subset of int type. C. "%3d" indicates that this number will be output with 3 digits width. D. can be used to judge the equality of two floating-point numbers. 6) In the following statements about expression, which is INCORRECT? A. The default case is required in the switch selection statement. B. The break statement is required in the default case of a switch selection staterm C. The expression (xy && a y or a b is true D. An expression containing the operator is true if either or both of its operands is true