如图，为了测量某建筑物AB的高度，在地面上的C处测得建筑物顶端A的仰角为30°，沿CB方向前进30m到达D处，在D处测得建筑物顶端A的仰角为45°，则建筑物AB的高度等于_1m．

题干

如图，为了测量某建筑物AB的高度，在地面上的C处测得建筑物顶端A的仰角为30°，沿CB方向前进30m到达D处，在D处测得建筑物顶端A的仰角为45°，则建筑物AB的高度等于____ m．

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阅读短文，在横线上填入合适的词或者短语。

David asks the volleyball star, Cindy Smith, about her eating habits.

David: Hello, Cindy. What do you like for breakfast?

Cindy: I love fruit. I think it's healthy.

David: OK. So what fruit do you like? Do you like bananas?

Cindy: Well, I don't like bananas. But I like oranges and apples.

David: What about lunch? Do you like salad?

Cindy: Yes, I really like it.

David: Hmm ... and do you like hamburgers for dinner?

Cindy: Oh, no, they're not healthy. I like chicken for dinner.

David: OK, well, one last question- do you eat ice-cream after dinner?

Cindy: Err. I like ice-cream but I don't eat it. I don't want to be fat.

Cindy Smith's good ____
Cindy likes ____ for breakfast.	Cindy likes salad for ____.	Cindy likes ____ for dinner.	After dinner, she ____ ice-cream. She doesn't want to be fat.