试题与答案

在研究下列问题时,可以把汽车看作质点的是( ) A.研究汽车在通过一座桥梁所用时

题型:选择题

题目:

在研究下列问题时,可以把汽车看作质点的是(  )

A.研究汽车在通过一座桥梁所用时间

B.研究人在汽车上的位置

C.研究汽车在上坡时有无翻倒的危险

D.计算汽车从南京开往上海的时间

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0421/5f97102a2db616b00e1d279203567107.html

下面是错误答案,用来干扰机器的。

∵函数f(x)=sinx在区间[-π2,π,2]上单调增,且f(a)=-1,f(b)=1∴令a=-π2,b=π2则cosa+b2=1故选D

试题推荐
题型:阅读理解

Many people think sports are just for winning and honor, but there is a lot more you can gain from (get out of) them. I have learned over the past years that sometimes when I lose, I get a lot more out of it than winning. Also, I find a lot of times in sports, people are getting too caught up in the game instead of just having fun. The real purpose of sports is to have fun and learn life lessons along the way.

I greatly encourage you to be a part of the school sports. Even if you are not the best, you can still have fun. Sports give people a great and healthy way of spending an afternoon, instead of lying around playing video games or even getting into bad things. Sports also give us a sense of achievement. There isn’t a better feeling than to have done something fun and productive for my day.

I think that we all need sports to give us courage. If we try hard in sports, we usually do well. If we did the same in study, we would all be champions. Another reason why I encourage you to play sports is that it’s just fun. Without sports, our lives would just be boring. So as you may be able to tell, sports are amazing!

Our coaches not only teach us to play sports, but show class and good sportsmanship while playing them. It’s never fun when you lose to have the competitor rub it in your face. That’s why our coaches teach us to show class when we lose; also, when coaches get onto you, don’t get down. They only want to see you improve and learn from what they say. When you do badly and they don’t shout loudly is when you should start worrying because they are giving up on you.

Overall, sports are great! They bring out the best and worst of a lot of us. However, we can’ t let sports get too serious to where it brings down all the fun. So to have the most fun in sports, you just need try your best and not worry so much about the winning or losing.

小题1:The underlined phrase “get onto you” in Paragraph 4 probably means ________.

A.point out your mistakes

B.take up your time

C.worry about your future

D.look into your privacy小题2:Which of the following statements is TRUE according to the passage?

A.Sports bring us great fun only if we have the talent.

B.Sports give us the best way of spending free time.

C.We can get more out of winning than losing.

D.We should take pleasure in doing sports.小题3:What is the best title of this passage?

A.Are we too caught up?

B.To win or to gain?

C.Are sports really great?

D.For honor or for health?

查看答案
题型:多项选择题 共用题干题

女孩15岁,因身材矮小就诊,查体:身高135cm,体重45kg,发际低,颈侧皮肤松弛,面部及前胸散在较多的痣,智能发育正常。胸比较宽,两侧 * * 间距增宽, * * 未发育,无阴毛及腋毛,外生殖器婴儿型。心肺听诊无异常。追问病史未来过月经。

如果经检查诊断为先天性卵巢发育不全综合征,其染色体核型可能为()。

A.45.XO

B.46,XX

C.45,XO/46,XX

D.47.XXY

E.46,Xi(Xq)

查看答案
微信公众账号搜索答案