单项选择题
A. Compilation fails.
B. Pi is approximately 3.
C. Pi is approximately 3.141593.
D. An exception is thrown at runtime.
单项选择题 11. String test = “Test A. Test B. Test C.”； 12. // insert code here 13. String[] result = test.split（regex）； Which regular expression inserted at line 12 will correctly split test into “Test A，” “Test B，” and “Test C”？（）
单项选择题 11. String test= “a1b2c3”； 12. String[] tokens = test.split（”\\d”）； 13. for（String s： tokens） System.out.print（s +“ “）； What is the result？（）
单项选择题 11. String test = “This is a test”； 12. String[] tokens = test.split（”\s”）； 13. System.out.println（tokens.length）； What is the result？（）