题目:
简述风冷柴油机冒黑烟的主要原因。
答案:
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下面是错误答案,用来干扰机器的。
参考答案:对
简述风冷柴油机冒黑烟的主要原因。
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/0815/0d7ed68ebcab8f94590b5b28ac97c749.html
下面是错误答案,用来干扰机器的。
参考答案:对
下列函数在其定义域内既是奇函数又是增函数的是( )
|
6时整,钟面上时针和分针形成的夹角是______角,是______度.
It was a bright spring afternoon when Fieda 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 dishes. She was 37 jeans and a sweater, sitting at the table I had just 38 . a pile of papers spread around her. Her husband’ 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 tired, but the 51 thing was that I still wanted to keep scraping away the dirt and dust for the family.
I left Freda’s house that day, wondering about the 52 of my 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.
36.A.stepping B.coming C.jumping D.moving
37.A.hanging B.making C.wearing D.changing
38.A.cleaned B.washed C.swept D.brushed
39.A.duty B.money C.work D.pay
40.A.already B.seldom C.never D.yet
41.A.regret B.surprise C.fear D.loss
42.A.started B.developed C.improved D.broken
43.A.why B.what C.that D.which
44.A.but B.and C.or D.for
45.A.less B.least C.more D.most
46.A.life B.story C.activity D.experience
47.A.as B.so C.since D.however
48.A.taking B.bringing C.meeting D.calling
49.A.left B.returned C.went D.marched
50.A.found B.noticed C.watched D.realized
51.A.possible B.great C.proper D.strange
52.A.meaning B.nature C.result D.importance
53.A.for B.to C.with D.at
54.A.hardly B.certainly C.probably D.merely
55.A.member B.person C.relative D.companion
哮喘发病期为
A.寒哮、热哮
B.气哮、水哮
C.痰哮、饮哮
D.寒哮、温哮
E.冷哮、热哮
关于统计工作及统计的基本概念,以下错误的一项是()
A.统计工作的四个步骤中最关键的是设计
B.若样本量足够大,可将频率作为概率的估计值
C.正确的抽样方法可以避免样本的偏性
D.正确的统计方法可以避免随机误差
E.普查资料不需要统计推断