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At the age of four , our kids began to help us with the housework. They helped __ 1 __ their pets and clean the house. Now Tate can make her bed , __ 2 __ her clothes and set ( 布置 )the table. Last week , she even helped me __3__.We were happy because it was delicious. I like getting kids to start early for a few__ 4 __.First , it is fun for kids to help. Kids like to work __ 5 __ the same things as their parents do. They want to stay with their parents but to do things by themselves. It's a good time to _ 6 __ them to help you when you are busy. Second , it's never too __ 7 __ for them to learn some things. __ 8 __ , having kids do chores is not robbing ( 剥夺 )their playing time.__ 9 __ make(s) them know the joy of working.__ 10 __ , it does help. I feel that Tate likes doing chores and she helps me a lot. ( ) 1 .A.take care of B . look at C . get back ( ) 2 .A.buy B . fold C . make ( ) 3 .A.do chores B . do the dishes C . make dinner ( )4 .A.words B . reasons C . ways ( ) 5 .A.for B . out C . on ( ) 6 .A.invite B . make C . drive ( ) 7 .A.early B . popular C . important ( ) 8 .A.But B . Although C . However ( ) 9 .A.It B . They C . She ( ) 10 .A.Slowly B . Hardly C . Finally
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【简答题】退火的目的 :
【单选题】降压起动的目的是( )。
A.
降低启动电压
B.
降低启动电流
C.
降低启动转速
D.
降低启动转矩
【多选题】退火的目的是( ),正火的目的是( ),淬火的目的是( ),回退火的目的是( )。
A.
降低硬度,提高塑性
B.
改善低碳钢和低碳合金钢的切削加工性
C.
提高钢的强度和硬度
D.
减小或消除工件的内应力
【简答题】钢退火的目的是什么?
【单选题】降压起动的目的是( )。
A.
增加起动力矩
B.
减小起动电流
C.
提高绝缘强度
D.
节省电源
【简答题】冷轧生产中,初退火、中间退火和成品退火的目的各是什么?
【简答题】中国职业的变迁 职业从其产生开始,随着生产力的发展和社会分工的发展,一直处在不断的变化之中,有的兴起,有的消亡,有的繁荣发达,有的凋零衰败,各自经历着不同的命运。在职业产生初期,职业种类少,发展缓慢。随着社会的发展职业种类增加的速度逐渐加快。 据有关统计,我国封建社会初期(周朝 ) ,社会职业与行业是同义语,只被分为了六大类,即王公、士大夫、百工、商旅农夫、妇功,而所谓“百工”就是技艺匠人的总称,...
【简答题】钢进行扩散退火的目的是______,进行再结晶退火的目的是为了消除______,______,______。
【简答题】退火的目的?
【判断题】降压起动的目的是限制起动电流
A.
正确
B.
错误
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