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如图,点E在正方形ABCD的边CD上,把△ADE绕点A顺时针旋转90°至△ABF位置,如果AB= 3 ,∠EAD=30°,那么点E与点F之间的距离等于____.
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同类题1

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    It was a cold winter. The wind blew all night and the snow was blinding. When morning came, my three children and I got up and made our way to the windows. As we looked out the window, we saw that the henhouse was gone. Our three hens had been blown away.

    I looked at the emptiness outside. Then I saw all three chickens sat around the edge of a white bucket. How was this violent wind not blowing them into the field beyond? I quickly pulled on long snow pants and heavy winter coat, wrapped a scarf and stuck my feet into very large boots .

    I shouted at the wind as it blew. I was alone, save for my children. They stared out the window into the vast white sea of snow, their eyes peeled for any sign of movement. Outside I heard the sound of my boots as I walked against the wind.

    The snow circling around me, I steadily made my way to the soft cluck-cluck-cluck sound my hens always made. When I reached them, I saw that their little feet were holding on to the edge of the bucket, heads bent forward and away from the wind. I gently lifted each hen and put it carefully into the warm inside. Then I began the freezing walk back to the small shed directly behind our house. One by one I laid my chickens on the cold floor, and they began to cluck softly.

    As I shut the shed doors, my eyes went directly to the window where my children were watching. They jumped up and down cheering, and so did I! I wasn't some dragon slayer (屠龙者) from a fairy tale. I was simply a mom, but the look on my children's faces told me that they thought I was a hero mom.

同类题4

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    Teens have a busy morning schedule as they need to wake up and get moving very early in order to catch a bus and get to school by the required time.This means teens need to get their rest the night before or they will be too tired to learn anything at school.____

    When a teen falls asleep in class,two things happen: he/she misses what is being taught and he/she loses the respect for the teacher.He/She may also receive a consequence from the school,depending on the classroom discipline policy.____

    To prevent your teen from being sleepy in class,try these three tips:

    *Set a time for "lights out" on school nights.This is never be any later than 10 p.m. and preferably 9 p.m.____ Soft music can be on and used to help calm your teen.

    *Help your teen develop a night-time routine that involves activities that slow them down for the end of the day.____Turning off the computer and disconnecting from friends and the excitement of the day an hour before bedtime will also help your teen relax.

    *____This will reinforce(增强)what it feels like to be rested and capable of accomplishing what he/she wants.

A. Taking a bath and reading are two activities that work well.

B. What's worse,they may even fall asleep in class.

C. All of these things affect your teen's academic success and can be avoided.

D. "Lights out" means the computer,television,lights and cell phone should be off.

E. While your teen keeps his/her goals in line with your expectations,he/she may have his/her own goals.

F. Set a good example and show him/her your love for learning.

G. Point out the positives after your teen has had a good night's rest.