若二叉树中度为2的结点有15个,度为1的结点有10个,则有 ______ 个叶结点。

题型:单项选择题

问题:

若二叉树中度为2的结点有15个,度为1的结点有10个,则有 ______ 个叶结点。

A) 25
B) 30
C) 31
D) 16

考点:计算机等级考试C++二级C++笔试
题型:单项选择题
It was a bright spring afternoon when Freda told me she wouldn’t need me any more. I had just finished my four-hour work - 36  up and down the stairs of her three-storey home, cleaning the floor and washing the dished. She was  37 jeans and a sweater. Sitting at the table I had just   38 a pile of papers spread around her. Her husband’s 39   was going to be reduced by thirty percent. And they were trying to live as if it had 40  happened. I felt sorry for her, but I also felt a sense of   41 .
I had been cleaning Freda’s house for five years and had   42  an unexpected relationship with the family. It was not just   43  I had become an expert at scraping(刮掉)dirt stuck to their wooden floor.   44  that I had learned exactly how to place toys on the girls’ beds. It was   45  than that, for I felt I had become a part of their    46 .
Freda stayed at home with the kids,   47 I would often see her in the morning 48
them to school. And I’d be there when they   49  home at lunch for sandwiches and piano practice. I had   50  them grow up. Now I was fired, but the   51 thing was that I still wanted to keep scraping away the dirt and dust for the family.   
I left Freda’s  52  relationship with my clients(主顾). Who am I  53 them? As a matter of fact. I’m   54  an employee - the lowest kind of employee. But I’m also a trusted  55  of the family. I can’t help worrying about what happens around me.
小题1:
A.movingB.comingC.jumpingD.stepping
小题2:
A.hangingB.makingC.changingD.wearing
小题3:
A.washed B.cleanedC.sweptD.brushed
小题4:
A.dutyB.payC.workD.money
小题5:
A.neverB.seldomC.alreadyD.yet
小题6:
A.lossB.surprise C.fearD.regret
小题7:
A.startedB.improvedC.developedD.broken
小题8:
A.why B.whatC.thatD.which
小题9:
A.butB.andC.orD.for
小题10:
A.lessB.moreC.leastD.most
小题11:
A.storyB.lifeC.activityD.experience
小题12:
A.soB.asC.sinceD.however
小题13:
A.takingB.bringingC.meetingD.calling
小题14:
A.leftB.marchedC.went D.returned
小题15:
A.foundB.noticedC.watchedD.realized
小题16:
A.possibleB.greatC.properD.strange
小题17:
A.meaning B.resultC.natureD.importance
小题18:
A.forB.toC.withD.at
小题19:
A.merelyB.certainlyC.probablyD.hardly
小题20:
A.memberB.personC.relativeD.companion
题型:单项选择题

禁止标有()隔离标记的车辆与“140产品”车编入同一列车。[233010203]

A.△1

B.△2

C.△5

D.△6

题型:单项选择题

经济学中“有效需求”是指产品的产量根据()的变化而变化。

A.人们的需求

B.社会财富的总量

C.产品价格

D.社会平均劳动时间

题型:单项选择题

反映行政事业活动成果的会计要素的是()

A.资产

B.负债

C.净资产

D.支出

E.收入

题型:单项选择题

根据造成建筑物折旧的原因,可将建筑物折旧分为( )折旧。

A.经济

B.技术

C.物质

D.内部

E.功能

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