A公司是经国家批准的直销企业，2015年10月15日，A公司委托B公司（不是直销企业

根据语境，用恰当的语言完成对话。

A: Good morning, Mary.

B: Good morning, Helen. Come in, please.

A: Thank you. Your room is very nice. Oh! A bookshelf and many books. 1______

B: Thank you. I like reading, you know. I think reading can make a person wise.

A: Did you do well in the English exam?

B: Yes. I just learned I passed the English exam and the result is good. I have got an "A".

A: 2______ 

B: Thank you. 3______  Why?

A: We will have a math exam next Monday. I'm afraid I may fail the exam. So I've come for some help.

B: Don't worry. 4______ 

A: That's great. Thank you very much.

B: 5______  A friend in need is a friend indeed.

A: That's true. When shall we start?

B: Right now.

确诊之前需做如下口腔检查及辅助检查，除了

A．牙龈的色、形、质的变化

B．测血压

C．测体温

D．唇颊粘膜的检查

E．查血

患者，女，59岁，烦渴多饮，口干舌燥，尿频量多，舌边尖红，苔薄黄，脉洪数，治疗时宜选用

A．玉女煎

B．消渴方

C．六味地黄丸

D．金匮肾气丸

E．四君子汤

高频局放检测应确认被测设备（）接地良好，无开路风险。

A.一次

B.二次

C.末屏

D.外壳

由O157：H7大肠杆菌引起的出血性肠炎的典型症状是什么？