题干

给出几种变换:(1)横坐标伸长到原来的2倍,纵坐标不变;(2)横坐标缩小到原来的;纵坐标不变;(3)向左平移个单位;(4)向右平移个单位;(5)向左平移个单位;(6)向右平移个单位,则由函数图像得到的图像,可以实施的方案是

A:(1)(3)

B:(2)(3)

C:(2)(4)

D:(2)(5)

上一题 下一题 0.0难度 选择题 更新时间:2016-11-13 09:53:39

答案(点此获取答案解析)

D

同类题3

阅读理解

    TEENSGIVING is an exciting yearly event where hundreds of New York City teens gather together annually for a remarkable day of community service. This year, TEENSGIVING in SPRING 2016 participants will once again better New York City and influence thousands of lives!

    When is TEENSGIVING in SPRING 2016?

    Sunday, April 20, 2016

    Where is TEENSGIVING?

    All over New York City. Everyone will meet at the 92nd Street Y ( 92nd and Lexington ) at 9:00 AM for the event kick-off. Then, all TEENSGIVING volunteers will go across the city to work with our partnering agencies where they will make a HUGE difference and have fun!

Who participates in TEENSGIVING?

    Hundreds of teenagers from around the city. Teens come from the 92nd Street Y, various city schools, youth groups, and organizations in the area. In addition, many adult volunteers ( aged 21 and older) will donate their time to TEENSGIVING in SPRING 2016.

    What projects do participants do at the agencies?

    Sample projects include painting park benches, planting gardens, visiting and playing with poor and disabled children, assisting at animal shelters, working at soup kitchens, delivering meals and celebrating with families at homeless shelters.

    Do I get anything for participating in TEENSGIV1NG?

    Yes! Everybody benefits! Teen volunteers will receive “6 hours” of community service credit, good towards honor society, high school graduation and college application requirements. Adult volunteers will be thanked with a light breakfast, a gift certificate for their troubles, and the satisfaction of helping our city's youth contribute to their community. In addition, all teen and adult volunteers will receive a cool TEENSGIVING in SPRING 2016 T- shirt.

    This sounds awesome! How do I register for TEENSGIVING in SPRING 2016? Interested teens and/or adults should e-mail the TEENSGIVING Coordinator Josh Hyman at jhyman@92Y.org < mailto: jhyman@92Y.org > (subject: TEENSGIVING) to receive more information and to register for this fantastic event!

    Teens can also contact their school's Community Service Advisor.

    TEENSGIVING is sponsored by the 92nd Street Y.

同类题5

完形填空

     People have been raising pigeons(鸽子) for about 10,000 years. And pigeon  keepers use  different kinds of pigeons for different 1Some people use pigeons for 2 For example, in parts of China people cook a special meal with pigeon to celebrate the New Year.

Some people also keep pigeons because they look especially 3There are many interesting kinds of these “pretty” pigeons. Different kinds of pigeons have interesting features 4 long, soft tail feathers or designs on their heads. The owners of these kinds of pigeons enter them in 5  and the best looking pigeons are chosen to win prizes.

     But pigeons have many othe6   too. Pigeons can fly long distances without growing 7 . They also have another8sense. No matter how far from home they are, pigeons can usually fly back to where they9This is often called a “homing sense”. This sense makes them good for carrying10

     In many cities around the world, pigeons live in special houses, and pigeon keepers spend a lot of money and time11 their birds. When someone has a very good pigeon, he is very12    He may also have a way to make money.  But this is not usually the main13 people keep pigeons. For some people, they keep pigeons as a hobby.

     People love pigeons so much that they even take them14 when they move to a new country. They15 these birds as their children.  “When you are looking at a pigeon in the sky you feel free. It is the best feeling you have in a strange country”, a pigeon lover says.