Read and write．（根据提示完成下列句子。）

1. This ruler is_______________________(long)  than  that one.

2. This tree is___________________________(high) than that tree.

3. My grandpa is_______________________(old) than his grandpa.

4. My school is_______________________(big) than your    school.

体格发育评价（W体重，L身高，M中位数，s标准差）为消瘦的是（）

A.W/L＞M＋2s，L正常，W＞M＋2s

B.W/L＜M－2s，L＜M－2s，W＜M－2s

C.W/L正常，L正常，W＞M＋2s

D.W/L正常，L＞M＋2s，W＞M＋2s

E.W/L正常，L＜M－2s，W正常