八年級暑假作業(yè)答案（語文、數學、英語）
AF=FD
練習十
90° 18° 252°
16 15.5
略
6 12 40
20 20% 71～80
CAACA
練習十一
2.83
7
2(x平均數) S^2
4.4
7 7 3 1.2 乙
BBCDD
練習十二
≠±1 2
-x^5 y分之1
（-1，6）
Y=-x分之1
x≥3且x≠-0.5
＞2 三
m＜3分之2
95°
10
12
3.16
10
67.5°
DBDBD BCCCB
練習十三
x^2 -4分之x^2+4x+9
2
-5
-7
Y=6x-2
二四 增大
1＜m＜2
有兩個銳角互余的三角形是直角三角形 真
8
8
圓心角
6
6
AB=AC
ACDAB BB
練習十四
2
3.1×10^-4 4.56×10^4
(-2分之3, 2分之5 )
根號2
-a分之2b
X=2
根號2
107°
∠B=∠E
30cm
3
CDDAB DDC
練習十五
＞-2
x+y分之x^2 +y^2
85
-6
-3分之4 3分之5
m＜0.5
減小
3
26cm
40°
ADBAC CCCDC
練習十六
ACCCB 1或1.5
3分之5或 -1
-1或2
1 (-4)
2x^2 +5x+2 …….
英語的
練習一
present;since;doctor;pollution;open;D;A;B;A;C;B;B;AD;B;was taught;married;swim;came;have been;have lived;was.
練習二
changes;seen;in fact; marry; southern; had fun; won't until; have been married; has kept; different from
A A D B D A B B
練習三
possible;service;althgough;attraction;present;have;since;How many;When buy;Have carried;been;hasn't;sad;去掉but;yet;next to;has been opened;any longer;how to get;It's to read;It is came;but came;have known;are fond of
練習四
CBACCB；not arrived;yet;How long;heard;Has ever been;Has changed;yet;
I have lived here since I was born.
It's pleasant to play Chinese chess with my classmates.
Although Tom was ill,he went to school.
Where is Marry? She has gone to the cinema;
Have you been to Beijing?Yes I have.
I used to play computer games,now I don't do it.
練習五
a theme park;fast food;wave to us; get married;during the summer holiday;move at high speed;feel excited; the whole day; go sight-seeing;wait for an hour; stop taking photos; have gone to Shanghai; have been to Shanghai; on the second day;
careful;carefully;helpful;helpfully;hopeful;hopefully;wonderful;wonderfully;noisy;noisily;healthy;healthily;lucky;luckily;shiny;shinily;impolite;impossible;unkind;unpleasant;cheerless;harmful;different;present;cross;lovely;present;pleasant;of course;go back;performance;sailing;development;closing;education;feeling;discussing;meaning
練習六
have seen;saw;were doing;was helping ;do; was watching; knocking; were knocking; were making; didn't stop; to read; were dancing; not to take; were clapping; was marching;
The souvenirs are so expensive that I can't buy it.
He is rich enough to travel around the world
What were you doing when he arrived?
Daniel was swimming in the lake at noon yesterday;
useless;delightful;as;frightened;Italy;happily;meaning;exciting;screamed
練習七
outside;morning;called;office;suprised;tickets;because;cinema;themselves;taken;CBCADBACBD