克罗恩病与其他疾病鉴别最重要的检查方法是

A．血清溶菌酶浓度测定
B．粪便脂肪含量测定
C．胃肠钡餐检查
D．粪便常规及培养
E．回结肠镜检查

根据句意及首字母或汉语提示完成单词。

1. —Hello, may I speak to Lucy?

    —Sorry, she isn't in. May I take a m________ for her?

2. We don't have much time left. Please make a  d________ as soon as possible.

3. This is her book. My_________ (自己的)book is  in my backpack.

4. Mary felt sick because of the _________(稀薄的)air.

5. The building is 200 ________(米)high.