在无DNS情况下需在主机列表中添加IP地址。
A. 对
B. 错
A method can be declared with no parameters.
A. true
B. false
Arguments to methods always appear within __________.
A. parentheses
B. quotation marks
C. curly braces
D. brackets
If a method does not contain any parameters, you must invoke it with a pair of empty parentheses.
A. false
B. true