过点(-1,1)作直线,若它与抛物线y2=4x有且只有一个公共点,这样的直线共有

题型:选择题

问题:

过点(-1,1)作直线,若它与抛物线y2=4x有且只有一个公共点,这样的直线共有(  )

A.1条

B.2条

C.3条

D.4条

考点:抛物线的性质(顶点、范围、对称性、离心率)
题型:选择题

Some people think only school children do not agree with their parents, however, it is not true.

Communication is a problem for parents and children of all ages. If it’s hard for you to communicate with your parents, don’t worry about it. Here are some advice for you to bridge the generation gap (代沟).

Don’t argue (争辩) with your parents. Don’t get to your parents when you are angry. Your parents probably won’t consider your ideas if you are shouting at them. And you can’t express yourself well if you are angry. Go someplace to cool off. Make sure you understand why you are unhappy. Then think about what you want to say to your parents. If you don’t think you can speak to them at the moment, try writing a letter.

Try to reach a compromise (和解). Perhaps you and your parents disagree on something. You can keep your disagreement and try your best to accept each other. Michael’s mother didn’t agree with him about buying a motorcycle. They argued over it. But they finally came to a compromise. Michael bought the motorcycle, but only drove it on certain days.

Of course, your parents might refuse to compromise on something. In these situations, it is especially important to show love and respect (尊敬) to them. Showing respect will keep your relationship strong.

Talk about your values. The values of your parents are probably different from those of your own. Tell your parents what you care about, and why. Understanding your values might help them see your purposes in life.

A good relationship with your parents can make you a better and happier person. It is worth having a try!

小题1:According to the passage who have a communication problem?

A.parents and other people

B.only school kids and their parents

C.teachers and their students

D.parents and children of all ages小题2:How many pieces of advice does the writer give us to bridge the generation gap?

A.5.

B.4.

C.3.

D.2.小题3:The underlined word “bridge” in the passage means “______”.

A.建立

B.消除

C.通过

D.到达小题4:If the values of your parents are different from those of yours, you’d better ______.

A.argue with them

B.keep away from them

C.agree with them all the time

D.tell your parents what you care about小题5:The best title for the passage is______.

A.How to bridge the generation gap

B.How to deal with family problems

C.How to be good parents

D.How to be a good child

题型:选择题

在一道商是8的除法算式里,被除数、除数、商和余数的和是105.除数是______.

题型:选择题

在一次执行特殊任务的过程中,在距地面80 m高的水平面上做匀加速直线运动的某波音轻型飞机上依次抛出a、b、c三个物体,抛出的时间间隔为1 s,抛出点a、b与b、c间距分别为45 m和55 m,三个物体分别落在水平地面上的A、B、C三处.求:

(1)飞机飞行的加速度;

(2)刚抛出b物体时飞机的速度大小;

(3)b、c两物体落地点B、C间的距离.

题型:选择题

柴油机装配时要对准各对齿轮的(),才能保证气门按规定时刻开闭、喷油泵按规定时刻喷油。

题型:选择题

妊娠八九个月时,或腹中痛,痛定仍然如常者称()

A.妊娠腹痛

B.胞阻

C.试胎

D.弄胎

E.胎动不安

更多题库