一辆列车沿直线轨道前进,从刹车开始到停车这段时间内,测的刹车后t秒内列车前进的距

题型:填空题

问题:

一辆列车沿直线轨道前进,从刹车开始到停车这段时间内,测的刹车后t秒内列车前进的距离为S=27t-0.45t2米,则列车刹车后 ______秒车停下来,期间列车前进了 ______米.

考点:二次函数的性质及应用导数的运算
题型:填空题

患者女,26岁,妊娠33周,因“发热、颜面部红斑”来诊。既往自发性流产3次。查体:血压190/110mmHg(1mmHg=0.133kPa);实验室检查:抗核抗体、抗Sm抗体均阳性,抗双链DNA(dsDNA)抗体78%;抗心磷脂(ACL)抗体、抗β2糖蛋白Ⅰ(β2-GPⅠ)抗体均阳性;补体C30.3g/L,C40.02g/L;血常规:白细胞2.7×109/L,血小板56×109/L;24小时尿蛋白定量1.8g,血清清蛋白30.2g/L。

提示该患者经积极治疗及保胎后,仍无法避免流产。患者可以再次妊娠的情况是()

A.永远无法妊娠

B.系统性红斑狼疮病情控制稳定后

C.完全停药后

D.随时可以妊娠

E.此次流产后6个月以上

F.血压平稳

题型:填空题

阅读理解。

     Football, to me, is more than just a game. I have probably learned more valuable lessons from it than from

school.

     When I joined the team freshman year, I didn't realize what I was getting into. Even though I had been

playing since fourth grade and knew it was hard work, nothing would prepare me for the effort I would put

into football that year. We worked all summer in the weight room and ran on the track to get in physical and

mental shape before the season.

     See, football is more of a mental sport than anything else, so running on the track wasn't only about getting

in shape. We would push our minds by running as hard as we could even if we were going to pass out. At the

beginning, I was immature (幼稚) and only thought of myself, sometimes even gave up when I was tired or

hurt. Then after the third game I had a season-ending injury. Imagine working all summer and then only being

 able to play three games! I needed surgery on my arm and at least five months to recover.

     Needless to say, I missed the rest of the season, but this actually helped me realize that since you never

know when your last play will be, you should try your hardest in football and life.

     After freshman year I decided that I would always give my best effort. Playing varsity (校队的) football

has taught me so much more than just what my assignments are on a particular play or how to block. I have

learned to think about others first, and realized how important working hard is. Being with all my friends, even

sweating and bleeding with them, really made us bond as a group of hard-working young men who I know will

succeed in life.

1. What is the main idea of the passage?

A. How the author dislikes the game of football.

B. When the author began to play football.

C. How the author has changed his attitude to football.

D. What sport the author likes best.

2. In the third paragraph, the underlined phrase "getting in shape " probably means"_____ ".

A. becoming healthy

B. designing the playground

C. losing weight

D. measuring the track

3. From the text we can infer _____.

A. the author joined the football team with a clear aim

B. football only brought the author certain assignments

C. the author never lost heart when he met with difficulty

D. the author worked all summer to get ready for the season

4. What did the author get from his season-ending injury?

A. A good chance on the team.

B. A good lesson about life.

C. A good relationship with his partners.

D. A good rest as he expected.

题型:填空题

一个或两个元音后面带上鼻辅音组成的韵母必然是鼻韵母。

题型:填空题

生产时合介桶应保留()悬浮液。

A.空

B.少量

C.中液位

D.高液位

题型:填空题

非正式领导所要承担的主要功能有()

A.满足组织中某些局部的、特殊的需要

B.为组织进行决策分析

C.沟通上下关系

D.协调领导与下属的矛盾

E.确定组织的目标和使命

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