题目内容

For the molecular weight distribution, which one of the followings is not correct()

A. There is a considerable variation in molecular weight of polymers
B. The molecular weight distribution can be expressed by the ratio Mw/Mn
C. A polymer sample can be considered as a mixture of chains having different lengths
D. The molecular weights of polymers are usually uniform

查看答案
更多问题

学生表student包含学号sno、学生姓名sname、性别sex、年龄age、所在院系dept、籍贯native等字段,其中age为整型,其余字段均为字符型。现插入一条计算机学院学生的记录,学号为s320078,姓名为张强,性别为男,年龄为20,下列语句错误的是__()

A. INSERT INTO tb_student (sno, sname, sex, age, dept, native) VALUES(‘s320078’, ‘张强’,’男’,20, ‘计算机’)
B. INSERT INTO tb_student (sno, sname, sex, age, dept) VALUES(‘s320078’, ‘张强’,’男’,20, ‘计算机’)
C. INSERT INTO tb_student VALUES(‘s320078’, ‘张强’,’男’,20, ‘计算机’,null)
D. INSERT INTO tb_student (dept, sno, sname, sex, age) VALUES(‘计算机’, ‘s320078’, ‘张强’,’男’,20)

类A中含有一个无形式参数无返回值的方法method,要使用类名A作为前缀就可以调用它,则该方法头的形式为()

A. static void method()
B. public void method()
C. final void method()
D. abstract void method()

main方法是Java Application程序执行的入口点,关于main方法的方法首部,以下()项是合法的

A. public static void main()
B. public static void main(String args[])
C. public static int main(String[] arg)
D. public void main(String arg[])

Christopher Marlowe’s best plays include the following except ____()

A. The Jew of Malta
B. The Tragical History of Doctor Faustus
Cymbeline
D. Tamburlaine the Great

答案查题题库