【简答题】下列有关类声明的代码片段,哪一项是正确的?A. package school; import java. sql.*; class Student { } B. import java.sql.*; package school; class Student {} C. package school; class Student{ } import ...
【单选题】下列有关类声明的代码片段,哪一项是正确的?
A.
package school; import java. sql.*; class Student { }
B.
import java.sql.*; package school; class Student{ }
C.
package school; class Student{ } import java. sql.*;
D.
package school; import java. sql.*; private String name; class Student { }
【单选题】下列有关类声明的代码片段,哪一项是正确的?()
A.
import java.sql.*; package school; class Student{ }
B.
package school; import java.sql.*; class Student{ }
C.
package school; class Student{ } import java.sql.*;
D.
package school; import java.sql.*;private String name; class Student{ }
【单选题】某建设工程发生一起质量事故,导致3人死亡,45人受重伤,则该起质量事故属于( )。
【判断题】A chiral molecule will always have a diastereomer.
【判断题】A diastereomer of a chiral molecule must also be chiral.
【判断题】A chiral molecule will always have an enantiomer.
【简答题】在机械传动中,为保证齿轮传动的平稳可靠性,齿轮齿廓通常采用( )。
【单选题】下列有关类声明的代码片段,哪一项是正确的?
A.
package libray; import java.sql.* ; class Book { }
B.
import java.sql.* ; package libray; class Book( )
C.
package libray; class Book{ } import java.sql.*;
D.
package libray; import java.sql.*; private String ISBN; class Book { }