VRP提供两种帮助功能，分别是
A. 部分帮助。
B. 完全帮助。
C. 对应帮助。
D. 系统帮助。
在VRP系统中使用TAB键的作用是？
A. 删除光标左边的第一个字符
B. 输入一个不完整的命令并按TAB键，就可以补全该命令
C. 光标左移一位
D. 光标右移一位
Which elements are needed to construct a repeating section of code (loop).
A repetition statement
B. A condition expression
C. A statement that initially sets the condition being tested
D. A statement within the repeating section of code that alters the condition
Which statements does C provide to construct loops?
A. if statement
B. if-else statement
C. while statement
D. for statement
E. do-while statement
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