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- ac曲线是什么
- 英语翻译Consequently the
- 六年级英语三年级起使用1到六模块的过去式
- 写出下列动词的过去式和过去分词,并总结每
- 英语单词什么是过去式
- 谁能给我一般过去式中的规则变化动词.有四
- 写出下列动词的过去式和过去分词,并总结每
- CIF什么意思
- 有人说F
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ac曲线是什么
ac表示交流电,这是指电流方向随时间作周期性变化的电流,在一个周期内的平均电流为零。不同于直流电,它的方向是会随着时间发生改变的,而直流电没有周期性变化。
通常交流电(简称AC)波形为正弦曲线。交流电可以有效传输电力。但实际上还有应用其他的波形,例如三角形波、正方形波。生活中使用的市电就是具有正弦波形的交流电。
英语翻译Consequently the
Consequently the penalty is approximately $3400/kW for the above example.
因此,针对以上的例子,罚款是大约是3400美元/千瓦.
The pumping station designer can influence to some extent the type of pump required by distributing the total delivery flow over the appropriate number of pumps.
泵站设计者可以在一定程度上影响泵的类型所要求的流场分布与总交货适当数量的水泵.
The highest possible efficiency is to be obtained by suitable choice of the number of pumps and of the speed of rotation..
达到的最高可能效率是合理选择水泵的数量和的旋转速度.
There is an illustration of the relative peak efficiency for several pump types in Figure 7.
有一个说明几种泵类相对最高效率的 说明图(图7)
Polishing the impeller flow channels has an influence on the efficiency of water transport pumps.The costs of improving the efficiency this way are low in comparison with those of the
complete plant.
抛光叶轮流动渠道效率影响水分传输的水泵.用这种方法提高效率所有的成本与成套设备相比较低.
An example of the approximate cost distribution for a water transport system in the Middle East is given here.
这有提供一个中东近似成本水运系统分布的例子.
It has to be noted 3 that the specific energy requirement in kWh/m is 10 times the value that applies for a normal European installation,since the Figure 8.Axial Thrust Measurements on Horizontally Split,pipeline lengths are much greater.
必须指出3,特定能量度/ m要求达到10倍于欧美国家的政策安装标准,8图中可以看出,在测量水平轴向推力、管道长度的要大得多.
每一句都精心翻译
六年级英语三年级起使用1到六模块的过去式
drink---drank----drunk
ring----rang-----rung
swim----swam----swum
sing----sang----sung
sink----sank----sunk
blow----blew----blown
grow----grew----grown
know---knew---known
fly ----flew----flown
take----took----taken
shake----shook----shaken
drive----drove----driven
write---wrote---written
rise---rose---risen
ride----rode----ridden
speak----spoke----spoken
steal----stole----stolen
break----broke----broken
wake----woke----woken
freeze----froze----frozen
forget----forgot----forgotten
choose----chose----chosen
draw----drew----drawn
eat----ate----eaten
fall----fell----fallen
give----gave----given
hide----hid----hidden
see----saw----seen
do----did----done
cost(花费) cost cost
cut(割) cut cut
hit(打) hit hit
hurt 伤害) hurt hurt
let(让) let let
put(放) put put
read (读) read read
(2) AAB型(动词原形与过去式同形)
beat(跳动) beat beaten
(3) ABA型(动词原形与过去分词同形)
become(变成) became become
come(来) came come
run(跑) ran run
(4) ABB型(过去式与过去分词同形)
dig(挖) dug dug
get(得到) got got
hang(吊死) hanged hanged
hang(悬挂) hung hung
hold(抓住) held held
shine(照耀) shone shone
sit(坐) sat sat
win (赢) won won
meet(遇见) met met
keep (保持) kept kept
sleep(睡) slept slept
sweep(扫) swept swept
feel(感觉) felt felt
smell(闻) smelt smelt
leave(离开) left left
build(建设) built built
lend(借出) lent lent
send (传送) sent sent
spend(花费) spent spent
lose (丢失) lost lost
burn (燃烧) burnt burnt
learn(学习) learnt learnt
mean(意思是) meant meant
catch(抓住) caught caught
teach(教) taught taught
bring(带来) brought brought
fight (战斗) fought fought
buy(买) bought bought
think(想) thought thought
hear (听见) heard heard
sell(卖) sold sold
tell(告诉) told told
say(说) said said
find(找到) found found
have/has(有) had had
make(制造) made made
stand(站) stood stood
understand明白understood understood
(5) ABC型(动词原形、过去式与过去分词三者不同形)
begin(开始) began begun
drink(喝) drank drunk
ring(铃响) rang rung
sing (唱) sang sung
swim(游泳) swam swum
blow(吹) blew blown
draw (画) drew drawn
fly(飞) flew flown
grow(生长) grew grown
know(知道) knew known
throw(投掷) threw thrown show(出示) showed shown
break(打破) broke broken choose(选择) chose chosen
forget(忘记) forgot forgotten (forgot)
speak(说,讲) spoke spoken
wake(醒) woke woke
drive(驾驶) drove driven
eat(吃) ate eaten
fall(落下) fell fallen
give(给) gave given
rise(升高) rose risen
take(取) took taken
mistake(弄错) mistook mistaken
ride(骑) rode ridden
write(写) wrote written
do(做) did done
go(去) went gone
lie(平躺) lay lain
see(看见) saw seen
wear (穿) wore worn
be ( am, is, are )(是)was, were been
1. A---A---A型(现在式、过去式和过去分词同形)
动词原形(现在式) 过去式 过去分词
cost cost cost 花费
cut cut cut 割,切
hit hit hit 打
let let let 让
put put put 放下
read read read 读
hurt hurt hurt 伤
2. A---A---B型(现在式和过去式同形)
beat beat beaten 打
3. A---B---A型(现在式和过去分词同形)
come came come 来
become became become 变
run ran run 跑
4. A ---B ---B型
(1)在动词原形后加一个辅音字母d或t构成过去式或过去分词.
burn burnt burnt 燃烧
learn learned/learnt learned/learnt 学习
mean meant meant 意思
hear heard heard 听见
(2)把动词原形的最后一个辅音字母“d”改为“t” 构成过去式或过去分词.
build built built 建筑
lend lent lent 借给
lose lost lost 失去
send sent sent 送
spend spent spent 花费
(3)其他
pay paid paid 付
lay laid laid 下蛋
say said said 说
bring brought brought 带来
buy bought bought 买
think thought thought 想
sleep slept slept 睡
keep kept kept 保持
sweep swept swept 扫
stand stood stood 站
understand understood understood 明白
win won won 得胜
shine shone/shined shone/shined 发光
catch caught caught 抓住
teach taught taught 教
feel felt felt 觉得
fight fought fought 战斗
find found found 发现
get got got 得到
hang hanged/ hung hanged/ hung 绞死,挂
have had had 有
hold held held 盛,握
leave left left 离开
make made made 制造
meet met met 遇见
sell sold sold 卖
shoot shot shot 射击
tell told told 告诉
smell smelt/smelled smelt/smelled 嗅,闻
sit sat sat 坐
dig dug dug 挖
5. A---B---C型(现在式、过去式和过去分词都不相同)
(1)在动词原形后加-n或-en构成过去分词.
eat ate eaten 吃
fall fell fallen 落下
steal stole stolen 偷
give gave given 给
freeze froze frozen 冻结
take took taken 拿
see saw seen 看见
write wrote written 写
ride rode ridden 骑
drive drove driven 驾驶
throw threw thrown 抛,扔
blow blew blown 吹
grow grew grown 生长
know knew known 知道
fly flew flown 飞
draw drew drawn 拉,绘画
show showed shown 展示
(2)过去式加-n或-en构成过去分词.
speak spoke spoken 说话
break broke broken 破碎,折断
wake waked/ woke waked/ waken 醒
choose chose chosen 选择
forget forgot forgotten 忘记
(3)变单词在重读音节中的元音字母“i”分别为“a”(过去式)和“u”(过去分词).
begin began begun 开始
ring rang rung 按铃
sing sang sung 唱
sink sank sunk 沉
swim swam swum 游泳
drink drank drunk 饮
(4)其他不规则动词的变化.
be(am, is) was/ were been 是
be(are) were been 是
do did done 做
go went gone 去
lie lay lain 躺
wear wore wbe,am ,is -was
are-were
begin-began
break-kroke
bring-brought
build-built
buy-bought
can-could
catch-caught
come-came
do-did
draw-drew
drink-drank
drive-drove
eat-ate
fall-fell
feed-fed
feel-felt
find-found
fly-flew
forght-forgot
get-got
go-went
have,has-had
hear-heard
hold-held
keep-kept
knoe-knew
learn-learnt,learned
leave-left
let-let
make-made
may-might
mean-meant
meet-met
must-must
put-put
read-read
ride-rode
ring-rang
run-ran
say-said
see-saw
sell-sold
shall-should
shoe-shoeed
sing-sang
sit-
sat
sleep-slept
speak-spoke
stand-stood
swim-swam
take-took
teach-taught
tell-told
think-thought
throw-threw
understand-understood
will-would
write-wroteorn 穿
写出下列动词的过去式和过去分词,并总结每
1) AAA型(动词原形、过去式、过去分词同形)
cost(花费) cost cost
cut(割) cut cut
hit(打) hit hit
hurt 伤害) hurt hurt
let(让) let let
put(放) put put
read (读) read read
(2) AAB型(动词原形与过去式同形)
beat(跳动) beat beaten
(3) ABA型(动词原形与过去分词同形)
become(变成) became become
come(来) came come
run(跑) ran run
(4) ABB型(过去式与过去分词同形)
dig(挖) dug dug
get(得到) got got
hang(吊死) hanged hanged
hang(悬挂) hung hung
hold(抓住) held held
shine(照耀) shone shone
sit(坐) sat sat
win (赢) won won
meet(遇见) met met
keep (保持) kept kept
sleep(睡) slept slept
sweep(扫) swept swept
feel(感觉) felt felt
smell(闻) smelt smelt
leave(离开) left left
build(建设) built built
lend(借出) lent lent
send (传送) sent sent
spend(花费) spent spent
lose (丢失) lost lost
burn (燃烧) burnt burnt
learn(学习) learnt learnt
mean(意思是) meant meant
catch(抓住) caught caught
teach(教) taught taught
bring(带来) brought brought
fight (战斗) fought fought
buy(买) bought bought
think(想) thought thought
hear (听见) heard heard
sell(卖) sold sold
tell(告诉) told told
say(说) said said
find(找到) found found
have/has(有) had had
make(制造) made made
stand(站) stood stood
understand明白understood understood
(5) ABC型(动词原形、过去式与过去分词三者不同形)
begin(开始) began begun
drink(喝) drank drunk
ring(铃响) rang rung
sing (唱) sang sung
swim(游泳) swam swum
blow(吹) blew blown
draw (画) drew drawn
fly(飞) flew flown
grow(生长) grew grown
know(知道) knew known
throw(投掷) threw thrown show(出示) showed shown
break(打破) broke broken choose(选择) chose chosen
forget(忘记) forgot forgotten (forgot)
speak(说,讲) spoke spoken
wake(醒) woke woke
drive(驾驶) drove driven
eat(吃) ate eaten
fall(落下) fell fallen
give(给) gave given
rise(升高) rose risen
take(取) took taken
mistake(弄错) mistook mistaken
ride(骑) rode ridden
write(写) wrote written
do(做) did done
go(去) went gone
lie(平躺) lay lain
see(看见) saw seen
wear (穿) wore worn
be ( am,is,are )(是)was,were been
英语单词什么是过去式
过去式 有规则的也有特殊的,特殊的都是要记的.
规则的主要分为:1直接加ed
2双写加ed
3把y化i加ed
4以e结尾的直接加d
特殊的要靠死记,常用的有:(1) AAA型(动词原形、过去式、过去分词同形)
cost(花费)cost cost
cut(割) cut cut
hit(打) hit hit
hurt(伤害) hurt hurt
let(让) let let
put(放) put put
read(读) read read
(2) AAB型(动词原形与过去式同形)
beat(跳动) beat beaten
(3) ABA型(动词原形与过去分词同形)
become(变成) became become
come(来) came come
run(跑) ran run
(4) ABB型(过去式与过去分词同形)
dig(挖) dug dug
get(得到) got got
hang(吊死) hanged hanged
hang(悬挂) hung hung
hold(抓住) held held
shine(照耀) shone shone
sit(坐) sat sat
win(赢) won won
meet(遇见) met met
keep(保持) kept kept sleep(睡) slept slept
sweep(扫) swept swept
feel(感觉) felt felt
smell(闻) smelt smelt leave(离开) left left
build(建设) built built lend(借出) lent lent
send (传送) sent sent
spend(花费) spent spent
lose(丢失) lost lost burn(燃烧) burnt burnt
learn(学习) learnt learnt sell(卖) sold sold
tell(告诉) told told
mean(意思)meant meant
catch(抓住)caught caught
teach(教) taught taught bring(带来)brought brought
fight (战斗) fought fought
buy(买) bought bought
think(想) thought thought
hear (听见)heard heard
say(说) said said
find(找到) found found
have/has(有) had had
make(制造) made made
stand(站) stood stood
understand(明白)understood understood
谁能给我一般过去式中的规则变化动词.有四
(1)AAA型(动词原形、过去式、过去分词同形)
cost(花费) cost cost
cut(割) cut cut
hit(打) hit hit
hurt 伤害) hurt hurt
let(让) let let
put(放) put put
read (读) read read
(2) AAB型(动词原形与过去式同形)
beat(跳动) beat beaten
(3) ABA型(动词原形与过去分词同形)
become(变成) became become
come(来) came come
run(跑) ran run
(4) ABB型(过去式与过去分词同形)
dig(挖) dug dug get(得到) got got
hang(吊死) hanged hanged
hang(悬挂) hung hung
hold(抓住) held held shine(照耀) shone shone
sit(坐) sat sat win (赢) won won
meet(遇见) met met keep (保持) kept kept
sleep(睡) slept slept sweep(扫) swept swept
feel(感觉) felt felt smell(闻) smelt smelt
leave(离开) left left build(建设) built built
lend(借出) lent lent send (传送) sent sent
spend(花费) spent spent lose (丢失) lost lost
burn (燃烧) burnt burnt learn(学习) learnt learnt
mean(意思是) meant meant
catch(抓住) caught caught
teach(教) taught taught bring(带来) brought brought
fight (战斗) fought fought
buy(买) bought bought
think(想) thought thought
hear (听见) heard heard
sell(卖) sold sold tell(告诉) told told
say(说) said said find(找到) found found
have/has(有) had had
make(制造) made made
stand(站) stood stood understand明白 understood understood
(5) ABC型(动词原形、过去式与过去分词三者不同形)
begin(开始) began begun
drink(喝) drank drunk
ring(铃响) rang rung sing (唱) sang sung
swim(游泳) swam swum
blow(吹) blew blown
draw(画) drew drawn
fly(飞) flew flown
grow(生长) grew grown
know(知道) knew known
throw(投掷) threw thrown
show(出示) showed shown
break(打破) broke broken
choose(选择) chose chosen
forget(忘记) forgot forgotten (forgot)
speak(说,讲) spoke spoken
wake(醒) woke woke
drive(驾驶) drove driven
eat(吃) ate eaten fall(落下) fell fallen
give(给) gave given
rise(升高) rose risen
take(取) took taken mistake(弄错) mistook mistaken
ride(骑) rode ridden write(写) wrote written
do(做) did done
go(去) went gone
lie(平躺) lay lain see(看见) saw seen
wear(穿) wore worn
be ( am, is, are )(是) was, were been
以上是不规则动词变化表,我再补充一下哦,除了这些大部分动词都是规则变化的,主要有这几条:
1.一般直接加ed
2.以e结尾的去e加d
3.还有部分双写结尾字母再加ed的动词,如dropped
4.辅音字母 y的动词,去y变i加ed
里面有过去式 也有过去分词 前边是过去式
写出下列动词的过去式和过去分词,并总结每
1) AAA型(动词原形、过去式、过去分词同形) cost(花费) cost cost cut(割) cut cut hit(打) hit hit hurt 伤害) hurt hurt let(让) let let put(放) put put read (读) read read (2) AAB型(动词原...
CIF什么意思
你知道cif是什么意思吗?可能你在网络上偶尔会看到这样的词,但网络上的新词多到数不清,根本没有时间去仔细去了解,下面就让我们带你一起,来详细了解一下cif是什么意思吧。
cif是什么意思CIF术语的中译名为成本加保险费加运费,(指定目的港,其原文为Cost,InsuranceandFreight(insertnamedportofdestination)按此术语成交,货价的构成因素中包括从装运港至约定目的地港的通常运费和约定的保险费,故卖方除具有与CFR术语的相同的义务外,还有为买方办理货运保险,交支付保险费,按一般国际贸易惯例,卖方投保的保险金额应按CIF价加成10%。
如买卖双方未约定具体险别,则卖方只需取得最低限底的保险险别,如买方要求加保战争保险,在保险费由买方负担的前提下,卖方应予加保,卖方投保时,如能办到,必须以合同货币投保。
扩展阅读:CIF的定位CIF首先是一个支持银行生产的应用系统,支持通过联机和批量将客户信息放入CIF中,更改客户信息,获取客户信息。
有人说F
战机的战力是由战机的先进性丶空军训练的水准、战机面对的战扬环境、对战机的维护保养,这四个方面共同决定的。其中战机的后勤维护保养尤为重要,直接关系到战机的出勤率和安全使用系数。越先进的战机,就越精密,也越娇贵,对后勤保养维护的要求和依赖度,也就越高。
因此英国对F35战机频繁的维护保养是极为正确的。这一点恰恰证明了F35战机是精密度极高的先进武器,也恰恰证明了英国是个有深厚空军底蕴的空军强国。
先进战机不但价格昂贵,而且后勤保养维护也代价高昂,不是一般小国玩得起的。所以很多小国买得起好战机,却养不起好战机。他们在后勤保养维护上,要么能力不足,要么图省钱省事而偷工减料,结果没几年,买来的好战机就摔了大半。
其实美国对战机的后勤保养维护是全世界做得最细腻,也是做得最好的。只是大家不太关注罢了。