高热持续不退，烦躁，神昏，恶心呕吐，舌质红绛，应为 A．热毒内盛证 B．气阴耗伤证

基础设施状况，属于房地产市场运行环境中的()。

A、微观环境因素

B、宏观环境因素

C、经济环境因素

D、产业环境因素

按现行有关规定，应对工程中涉及结构安全的材料及施工内容进行( )。

A．封样鉴定

B．见证取样检测

C．模拟试件检测

D．同条件养护检测

交流电每秒完成的变化（）叫做频率。

书面表达（满分30分）

阅读下面这封中学生来信（摘自 China Daily 21 Century）.

Dear Editor:

I am a new student at Haining Hongda Senior High School. My home is far from Haining, so I must live at school. This is the first time for me to get away from my parents. I feel very sad. When I left home, I couldn’t help tearing myself away from them. I do not want to be alone at school, and I am a shy girl. I have been crying in bed at night these days. I want to stay at home forever. I miss my parents very much. Could you tell me what to do?

Your early reply is expected.

Regards

Amy

请根据以上内容，写一封回信（信的开头已为你好。词数120左右）。

回信应包括如下要点；

1．鼓励Amy坚定求学信心，志存高远，四海为家。

2．就Amy的目前状况，提两到三个建议。

Dear Amy:

Thank you for your letter. I am so glad to have a talk about your present situation with you.

何谓异型性？简述恶性肿瘤的异型性。