【单选题】Poor grades in school can have various causes. For one thing, students may have money problems. If they need to work long hours to make money, they will have less time to study. Another cause of poor ...
A.
A student may be not happy with family problems or the lack of friends.
B.
Poor grades in school can have various causes.
C.
That unhappiness can also harm schoolwork.
D.
Without such study skills,their grades are likely to suffer.
【多选题】Poor grades in school can have various causes. For one thing, students may have money problems. If they need to work long hours to make money, they will have less time to study. Another cause of poor ...
A.
Students may have money problems.
B.
Another cause of poor grades may be the relationship problems.
C.
A final cause of poor grades may be study problems.
D.
Without such study skills,their grades are likely to suffer.
【判断题】A final class can be inherited.
【判断题】A final class can be extended.
【单选题】Which of the following methods can be called using "class name.method ()"?
D.
abstract void method( )