A user’s laptop does not produce sound even though the volume settings are at maximum in theoperating system. Which of the following would MOST likely resolve this issue?（）

A、A new sound card

B、A new speaker

C、A BIOS update

D、A hardware volume control

EXHIBIT, Emp Table Exhibit A Exhibit B Examine the data from the EMP table. Evaluate this SQL statement: SELECT * FROM emp WHERE emp _ id = 3); WHERE commission = (SELECT commission FROM emp What is the result when the query is executed?（）

A、 Exhibit A

B、 Exhibit B

C、 The query returns no rows

D、 The query fails because the outer query is retrieving more than one column

E、 The query fails because both the inner and outer queries are retrieving data from the same table.

What is the binary equivalent of 242.168.94.124?（）

A、11110011 10101000 01011110 01111100

B、11110010 10101010 01011110 01111100

C、11110010 10101000 01011110 01111100

D、11110010 10101000 01010110 01111100

温切斯特技术是目前制造硬盘的常用技术。

A、对

B、错

Examine the description of the MARKS table: STD_ID NUMBER(4) STUDENT_NAME VARCHAR2(30) SUBJ1 NUMBER(3) SUBJ2 NUMBER(3) SUBJ1 and SUBJ2 indicate the marks obtained by a student in two subjects. Examine this SELECT statement based on the MARKS table: SELECT subj1+subj2 total_marks, std_id FROM marks WHERE subj1 > AVG(subj1) AND subj2 > AVG(subj2) ORDER BY total_ marks; What is the result of the SELECT statement?（）

A、The statement executes successfully and returns the student ID and sum of all marks for each student who obtained more than the average mark in each subject.

B、The statement returns an error at the SELECT clause.

C、The statement returns an error at the WHERE clause.

D、The statement returns an error at the ORDER BY clause.

在窗口上画一个名称为Text1的文本框和一个名为Command1的命令按钮，然后编写如下事件过程：程序运行后单击命令按钮，在文本框中显示的值是（　　）。

A、2

B、3

C、4

D、5