英語：
一：
1：honest
2：secret
3：ready
4：nothing
5：humour
6：bowls
7：magazines
8：special
9：slim
10：round
二：
1：Which boy is Peter?
2：Why his legs do not fit under the school desks?
3：Betty and I may not get to see each other often.
4：The boy called Jim wants to see you
5：Do you think climbing is as exciting as skating?
三：
1—5：EDBCA
四：
1—5：BDDBD
6—10：CCBAC
五：
1—5：BABAC
6—10：BCBDC
六：
1—5：AAAAB
練習(xí)二
一：
1：geography
2：tennis
3：point
4：health
5：elevator
二：
1：is different from
2：is more boring than
3：the tallest of
4：more subjectsthan
三：
like classes How many library have
四：
1—5：BDDCC
6—11：BBADAC
五：
1—5：DBABC
6—10：BDBCD
六：
1—5：BBDDC：
練習(xí)三
一：
1：tidy
2：President
3：winners
4：remember
5：tickets
二：
1：Nancy went to Suzhou by train last year .
2：She like her mother and likes her mother too.
3：Linda,don't tell anyone about the matter .
4：There are more than two hundred places of interest from Beijing.
5：It is fine ,but he don't go out and stay at home.
三：
1：teachers
2：6:00 a.m
3：6:30 a.m
4：park
5：4:00
6：80
四：
1—5：CBBDB
6—10：CCBBD
五：
1—5：DACBC
6—10：BDACB
六：
1—5：DDDBB
練習(xí)四
一：
1：litter
2：metal
3：Encourage
4：calm
5：over
6：shining
二：
1：tourists
2：peaceful
3：angerly
4：importance
5：heavier
三：
1：took
2：lasts
3：is going to be
4：hurry
5：don't will fall
四：
1：join the school trip
2：feel sick
3：make a home page
4：take a underground to go to work
五：
1：What exciting news it is!
2：for the first time
3：What did the teacher tell you not to do?
4：How often do you do a bird count a year?
5：用because連用
六：
1—4：DCBD
5—8：CABD
七：
1—5：DABBA
6—10：CCDCB
八：
1—5：CCDBA
練習(xí)五
一：
1：met
2：to make
3：travels
4：paies
5：are watching
6：will finish
7：droped
二：
1：go birdwatching
2：make space for
3：have nowhere to live
4：gives me some advice
5：at a time
三：
1：different from
2：If don't
3：made of
4：won'tany more
5：without help
6：rained heavily
7：because of its colourful feathers
8：endangered birds
四：
1：Jiangsu Dafeng is an idea home for Elaphurus davidianus.
2：He will arrive at 8 this morning.
3：l think running is not as exciting as driving.
4：The weather in Kunming is warm and wet aii year round.
5：We welcome visitors from around the world to Suzhou to visit.
6：I look out of the window and saw that people being rushed to remove the snow.
五：
1：telephone return
2：waswrote
3：not to make
4：playing
5：taking
6：terribly
7：moves
8：listens
六：
1：Yes.
2：Wolves
3：Humans
4：These dogs often came near humans to steal some food.
5：The dogs helped them to hunt.They could smell and hear danger before people could. They helped keep people warm on cold nights.
練習(xí)六
一：
1—5：DACCA
6—10：CACAD
11—15：DBBAB
16—20：BCCCB
二：
CGAEB
三：
1—5：ADBAD
6—10：DCBBC
四：
1—4：BABC
1—5：BACAD
物理：
1沙粒在跳動(dòng).聲音由物體振動(dòng)產(chǎn)生.沙粒跳動(dòng)很厲害.聲音的響度與振幅有關(guān).
2振動(dòng),音調(diào),空氣,信息,
3水可以傳聲,
4音調(diào),響度,
5次聲波,振動(dòng),
6聲音的音調(diào)與振動(dòng)頻率有關(guān),
7音色,空氣,
8傳播,人耳,聲源,
9聲音不能在真空中傳播,
10dB,0dB,20dB,
11A.
12D
13C.
14B.
15C.
16A.
17C.
18A.,
19丁
甲:聲音不能在真空中傳播 乙:聲音由物體振動(dòng)產(chǎn)生 丙:音調(diào)與振幅有關(guān),音調(diào)從低到高,兩者都是,
第三題 想一想
1A,2蜜蜂發(fā)聲不是由雙翅振動(dòng),3蜜蜂發(fā)聲由小黑點(diǎn)振動(dòng)產(chǎn)生,增加聲波反射從而減小聲波的能量
練習(xí)二
液化,凝華,吸,熔化,高,升華,凝華,汽化,放,汽化,汽化放熱,汽化,凝華,熔化,溫室,熱島效應(yīng),加壓,凝華放,汽化,液化,水汽化吸熱,液化,液化,汽化,升華,凝華,BDBCBB,冰,52,吸熱,冰不能太少,衛(wèi)生球燃燒松枝復(fù)燃空氣中的氧氣有助燃燒,熔化吸熱凝固放熱,沒有不同材料保溫效果不同.
練習(xí)三
紫外線,熱,熱效應(yīng),平面鏡,虛,光的直線傳播,平面,虛,1 3,C B A,漫反射,反射,粗糙,4,變大,漫反射,各種,ABCBBBB,略,略,畫圖略 (3)65度,到平面鏡距離,等大,不能,虛,物與像等大,用手電筒射向筆使影子在紙板上,紅色 除紅色以外的其他色光,紅色,白色,除白色以外的其他色光,略
練習(xí)4、5
會(huì)聚,折射,乙,折射,虛,鏡頭,底片,凹,后,凸透鏡,以內(nèi),倒立放大實(shí),凸透,會(huì)聚,CAAAD,法線,光的折射,畫圖略,光的折射,凸透鏡,三者中心不在同一直線,像距,物距,不能,能,紫,紫光折射角大,小,大,正確,物距,晶狀體,視網(wǎng)膜,凸透鏡對(duì)光線有會(huì)聚作用,靠近凸透鏡,發(fā)散,折射,大氣層空氣密度不同,B,塑料膜相當(dāng)于凸透鏡對(duì)光線有會(huì)聚作用,使底片的感光調(diào)物距使底片感到不同顏色的光,
毫米,千米,分鐘,地面,火車,車站,運(yùn)動(dòng),靜止,船,地面,船,山,20,72,30秒,11,46,3*10的八次,1.5*10的六次,快,勻速直線,相同時(shí)間比路程,相同路程比時(shí)間,運(yùn)動(dòng),靜止,參照物,大,動(dòng)能,3000,聲音不能在真空中傳播,72,86.4,B,B,D,D,B,B,A,B,C,B,D,B,A,C,13,控制變量,停表,測量下落時(shí)間,自由落體,同時(shí),是, 自由落體定律 ,V=S/T 4500M/15/60H=30000M/H=30KM/H,T=S/T=4500M/6KM/H=45MIN,運(yùn)動(dòng),8M/S,慢,車速60KM/H限速40KM/H,相對(duì)于地面是運(yùn)動(dòng)的,相對(duì)于航天員航天員是靜止的