根据汉语意思写单词

1. The little dog is very sad, because it can't find its ________ (主人).

2. The girl in a ________ (马尾辫)over there is my sister.

3. When you want to get a job from a company, you should give them your ________ (简历).

4. Tom is a ________ (有礼貌)boy. He always says "hello" to his teachers.

5. I want to play tennis with my friends, but I can't find my ________ (球拍).

球内系膜细胞来源于（）。

A、成纤维细胞

B、平滑肌细胞

C、毛细血管内皮细胞

D、肾小囊壁层细胞