Unit 6 phrases in Grade 8 English volume 1

1. Talk about 2. In some ways 3. More than 4. In common 5. Enjoy doing sth Be good at = do well in as… (no) such as ...

Grade 8 Volume 1 English phrases

A lot of = lots of 7. Once / twice a week 9. The result of 11. Want sb. To do sth

There are 16 key phrases and 8 sentences in unit 2!

What's the matter? What's the matter

Primary school mathematics problem. Calculate the total number of days in class this semester
At the end of each semester, students should fill in the total number of days of a semester in their quality report. This semester starts on February 5, 2004 (Wednesday) and ends on July 2, 2004. Please calculate the total number of days of this semester. (except may day legal holiday and weekly legal rest time)

February 29 - February 25 + 1 + 31 + 30 + 31 + 30 + 2 = 129 days, 129 ／ 7 = 18 weeks and more than 3 days, 2 days * 18 = 36 days, 36 days + 1 day (May Day) = 37129-37 = 92 days, that is, a total of 92 days. First, there are 129 days from February 25 to July 2, 2014, and then 129 ／ 7 = 18 There are 18 weeks and 3 days in a week

Putonghua pronunciation and standardization
In a word: because of such a small matter, you are angry. Are you?
Is the second half of this sentence in line with the standard of Putonghua? 2, how to pronounce "as for" here? Dictionaries mark four tones and two tones, but usually speaking in this case, generally speaking is four tones and four tones, and the latter syllable also needs to be lengthened and stressed. Is it the change of flow sound, or do you usually speak according to the dictionary mark?

If you emphasize "as for", when you read four tones, you don't have a tone. If you say both of them are four tones, it's definitely not Putonghua

The straight line L passes through the focus of the parabola y ^ 2 = 29x (P > 0), and intersects with the parabola at two points a (x1, Y2), B (X2, Y2), point C is on the directrix of the parabola, and BC | X axis, which proves that the straight line AC passes through the origin

It is proved that the focus of the parabola is (29 / 4,0) and the equation AB is y = K (X-29 / 4). Substituting the equation y ^ 2-29 / k * y-29 ^ 2 / 4 = 0 of the curve equation, we can get Y1 + y2 = 29 / K, Y1 * Y2 = - 29 ^ 2 / 4

The calculation of percentage equation
x-40%x=3.6 25%x-16=24 30%x+90=117
x-20%x=28 60%+4x=27.6 14%x-9.1=0.7
35%x+x=13.5 x-75%x=0.5 x-45%x=110
75% x-50 = 22

x-40%x=3.6
60%x=3.6
x=6
25%x-16=24
25%x=40
x=160
30%x+90=117
30%x=27
x=90
x-20%x=28
80%x=28
x=35
60%+4x=27.6
4.6x=27.6
x=6
14%x-9.1=0.7
14%x=9.8
x=70
35%x+x=13.5
1.35x=13.5
x=10
x-75%x=0.5
25%x=0.5
x=2
x-45%x=110
55%x=110
x=200
75%x-50=22
75%x=72
x=96

Does inverse proportion function have symmetry axis`

The axis of symmetry with y = K / X is y = - X and y = X

Find an integral about the surface area
Find the surface area of surface z = 1 + 3x + 2Y ^ 2 on triangle (0,0), (0,1), (2,1)
(0,0), (0,1), (2,1) are the three vertices of a triangle

dz/dx=3,dz/dy=4y.
Therefore, DS = √ (1 + (DZ / DX) & # 178; + (DZ / dy) & # 178;) DXDY = √ (1 + 9 + 16y & # 178;) DXDY = √ (10 + 16y & # 178;) DXDY
It can be seen that DS has nothing to do with X. the length of integration in X direction on triangle is 2Y, and the integration domain of Y is [0,1]
therefore
S=∫ [0,1] 2y√(10+16y²)dy = 1/24 (10+16y²)^(3/2) | [0 1]=1/24 (26^(3/2)-10^(3/2)).

What's the simple method of mixed operation of sixth grade scores
What's the good trick of fractional mixed operation

First multiply and divide, then add and subtract, and first calculate in brackets. Remember the operation laws well, and it will be much easier to master them. Finally, you must do more questions. If you do more, you can easily see the simple method. Practice makes perfect

Unit 6 phrases in Grade 8 English volume 1