假设你是Jane,向你的美国朋友Maria写一封信，介绍你的学校生活和课外活动。不少于60个词（信的开头和结尾已给出，不计入总词数）。(提示词:classes begin ,favorite subject, after school, play basketball, run around the playground…)

Dear Maria,

My school life is very interesting.

I love my school life very much. How about you?

Yours,

Jane

企业在实施CRM过程中主要存在哪些问题？