Dear Eli,
I am writing to tell you that I won’t be able to attend the wedding ceremony of your daughter.
Last week I received your invitation and knew that the wedding ceremony will be held at C:00 pm this Saturday. I hope to attend it very much, but I can’t because I have already promised my sister to help her move into her new house this coming Saturday and Sunday. You know that there is always much to do and much to be taken care of when people are moving into their new house. However, I am going to pay a special visit to the new couple next weekend. Please pass my best wishes to your daughter and your son-in-law.
Accept my sincere apology again.
第21题: [单项选择]下面关于B737-600增压系统后溢流活门马达的说法正确的是()。 A. 后溢流活门有一个交流马达、一个直流马达 B. 后溢流活门有一个自动方式马达、一个人工方式马达 C. 后溢流活门有两个自动方式马达、一个人工方式马达 D. 后溢流活门有两个自动方式马达、两个人工方式马达 参考答案:C
第33题: [单项选择]一穴肛原癌是指在齿线上方狭窄的环行区,由上皮细胞演变而发生,这种上皮细胞的类型是 A. 柱状上皮 B. 移行上皮 C. 鳞状上皮 D. 混合上皮 E. 肛管单层上皮 参考答案:B 答案解析:[解析] 齿线上方狭窄的环形区是胚胎一穴肛残余,在环形区有柱状上皮、鳞状上皮、移行上皮或三种混合上皮,由此区移行上皮发生的癌称一穴肛原癌。过去对此癌的组织学未完全了解,因而按癌的不同形态而命名,曾被称