在匀强磁场中有一个原来静止的碳14原子核,它放射出的粒子与反冲核的径迹是两个相内

题型:选择题

问题:

在匀强磁场中有一个原来静止的碳14原子核,它放射出的粒子与反冲核的径迹是两个相内切的圆,如图所示.那么碳14的衰变方程为(  )

A.+

B.+

C.+

D.+

考点:带电粒子在匀强磁场中的运动α衰变β衰变半衰期
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These days, a lot of photos about how a three-year-old girl looked after her disabled father are  31    spread over the Internet. Many people were   32   by her. And people gave her a  33 nickname (绰号) “little strong girl”.
The little girl is Dong Xinyi. She was born in a small   34   in Dezhou, Shangdong Province. When she was several months   35 , her father Dong Jianshe had an accident   36  riding his motorcycle and lost his  37 . Two years later her mother left her father   38  the poor life. As an old saying goes, “ The children of   39   people manage household affairs early.” Little Xinyi had to do lots of housework. She   40  her father in her power. She cooked noodles, carried water, cleaned rooms and washed clothes. The little girl brings happiness and 41  to her poor family. And   42   , the local government has   43   medical treatment to her father and promised to cover all medical expenses(费用).    44  the same time, the government is also planning to raise money for the girl’s   45  . Now Dong Xinyi has got a chance to go to nursery school(幼儿园) like other children,
小题1:
A.happily B.certainlyC.carefullyD.widely
小题2:
A.movedB.marriedC.madeD.named
小题3:
A.bad B.wrong C.bright D.stupid
小题4:
A.cityB.villageC.hospitalD.capital
小题5:
A.youngB.littleC.oldD.big
小题6:
A.whereB.whileC.whetherD.how
小题7:
A.legsB.sonC.daughterD.wife
小题8:
A.because B.instead ofC.insteadD.because of
小题9:
A.richB.greatC.poorD.disabled
小题10:
A.took careB.took care of C.looked aroundD.looked for
小题11:
A.sadnessB.successC.freedomD.hope
小题12:
A.luckilyB.unluckilyC.likelyD.really
小题13:
A.refusedB.noticedC.offeredD.bought
小题14:
A.OnB.At C.InD.To
小题15:
A.informationB.interest C.suggestionD.education
题型:选择题

城市总体规划阶段的道路交通专项规划中,对城市道路的图纸绘制需要表达城市主次干道走向、红线宽度及()。

A.定位坐标

B.道路名称

C.道牙线

D.重要交叉口形式

题型:选择题
果园里桃树和杏树共360棵,杏树的棵数是桃数的
4
5
,杏树有多少棵?
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依次填入下列各句横线处的词语,恰当的一组是( ) ①美国世界级网球名将桑普斯在ATP总决赛冠军争夺战中,以3比0轻松击败他的老对手阿加西,又一次夺得冠军,这是他第五次______ATP。 ②春节期间,北京不少大中型商厦为促销贴出这样的布告:凡在本店购货满300元者,本店将______一份精美的礼品。 ③杭州大酒店越来越多,一流厨师供不应求,于是不少店家争相出高价招聘,有人戏称:“酒店挖______,肥了大厨师”。

A.问鼎惠赠墙角

B.夺冠敬赠墙角

C.夺冠惠赠墙脚

D.问鼎敬赠墙脚

题型:选择题

设想没有物质的运动的观点是( )。

A.唯心主义

B.不可知论

C.机械唯物主义

D.朴素唯物主义

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