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= $\sqrt{3}$ ，∠EAD=30°，那么点E与点F之间的距离等于____．

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根据对话语境，在空白处填写恰当的句子补全对话
A: Good morning!
B: Good morning! I’d like to join the school volunteer project, but____ .
A: OK, don’t worry. Let me help you.____ ?
B: I love singing and telling stories.
A: Well, you could help look after young children on weekends.
B: ____ . I can sing for them and tell them stories. I’m sure that  children will love me.
A: I agree with you. ____ ?
B: Sure. I am Peter White. My telephone number is 885-276.
A: OK. I’ll call you as soon as possible.
B: ____ .
A: It’s my pleasure.

如图表示某种真核生物细胞中进行的一项生理活动，据图分析下列叙述正确的是（　　）