Big brother and sister help The little brother thanked me first

It could be due to several reasons:

a. The card is not properly inserted, the sound card is not closely integrated with the expansion slot of the motherboard, and the "gold finger" on the sound card and the reed of the expansion slot are misaligned through visual vision. This phenomenon is common on ISA cards or PCI cards, and it is a common fault, and finding a way to get the sound card plugged in can solve the problem.

b、The input end of the active speaker is connected to the speaker output end of the sound card,The active speaker should be connected to the line-out end of the sound card,The signal it outputs has not been amplified on the sound card,The noise is much smaller。 Some sound cards have only one output, whether it is line-out or speaker depends on the jumper on the card, the default method is often speaker, so if necessary, you have to unplug the sound card to adjust the jumper.

c. The version of the installed sound card driver is not good, you may use the driver that comes with the system, if so, it is best to install a special sound card driver. If you have installed the drivers that come with Windows, you can select "Control Panel System Device Manager Sound, ** and Game Controller", click on each sub-device, and select "Properties Driver Change Driver Install from Disk". Insert the disk or disc that came with your sound card and install the manufacturer's drivers.

d. The shielding wire (grounding) of the audio is not in good contact, or the plug is in poor contact.

Volume control --- option – > set the auxiliary volume to mute and you're good to go.

The shielded wire (ground) of the speaker is not in good contact, or the plug is in poor contact.

Cosine theorem: c 2 = a 2 + b 2-2ab cosc so c = root number 2 because it is a triangle so a+b+c = so sin(a+c) = sin( -c) =sinb because cosc=3 4>0, so c belongs to 0 to 2, so sinc = root 7 5 by sine theorem c sinc=b sinb so sinb = root 14 5

15 red, 3 green, 3 red slashes

15 red, 3 green, 3 red line.

1.According to the title, x1>2, x2>2 ∴x1+x2>4.and x1+x2=-b a=-(m)=m m>4

2.∵-23.Question 3: I don't know what you're writing about.

4.Is there a mistake in the fourth question?

Let the student be x years old and the teacher be y years old, or spike.

When the student is just one year old, the teacher is y-x+1 years old, that is, x years old, and when the teacher is 37 years old, the student is 37-(y-x), that is, the sanobu y, so: y-x+1=x, 37-(y-x)=y, solve this equation.

x=13, spine search y=25.

The student is 13 years old and the teacher is 25 years old.

Happy learning.

The teacher is 25 years old, and "I" is 13 years old. Let the teacher be x, and "I" be not vertical y, then there is: y-(x-y)=1, y+37-x=x. After answering the teacher 25, "I" 13.

3.Make a right-angled side length: two root number six height on the hypotenuse edge: two-thirds root number six.

4.The radius is : root number 70

I don't know if it's correct.

1.It is known that your second aunt is 1.6 meters tall, and your third aunt is 1.78 meters tall. 2.If I show you your second aunt's legs, your third aunt's hands, what would your other aunt look like?

Sorry, I didn't see it clearly.