对虽未损失票款，但有章不循，执章不严的国税机关的票证管理人员、用票人员及单位负责人，

48岁女性患者，因慢性肾小球肾炎慢肾衰作血液透析已2年，近来感走路不便，下肢骨头酸痛，疑并发肾性骨营养不良症。

若要早确诊，首选的检查方法是（）

A.骨活检

B.1，25（OH）2D3测定

C.X线骨相

D.血清钙磷测定

E.骨活检

情景交际。根据对话内容，选择方框内句子完成下列对话。（5分）

Linda: Hi, Bruce! How was your trip?

Bruce:   小题1:   

Linda: Where did you go?

Bruce: I went to Qinghai with my parents.

Linda:    小题2:   

Bruce: It’s one of the most beautiful cities in

the east of China. I like it very much.

Linda: How long did you stay there?

Bruce: For a week.    小题3:  

Linda: Which is your favorite place?

Bruce:     小题4:   When I was there, I lost myself in the beautiful scenery.

Linda: What interesting things did you do there?

Bruce: Lots of things, such as swimming, boating, fishing.     小题5:  

Linda: Oh, really? I hope to go there for a visit one day.

男性，27岁，自幼起反复发作性咳嗽、胸闷，每次发作时静推“氨茶碱和地塞米松”可缓解，夜间发作更甚，以致剧咳不能入睡，无发热和盗汗，多次胸片未发现肺部实质性病变。反复使用过“罗红霉素、头孢菌素”等治疗均未见明显效果。查体双肺未闻及哮鸣音。
(1) 最可能的诊断是( )

A．咳嗽变异型哮喘
B．支原体肺炎
C．支气管内膜结核
D．原发性支气管肺癌
E．喘息型慢性支气管炎

典型的龙山文化不是从大汶口文化发展而来的，而是直接从仰韶文化发展下来的。

若a和b是一对共轭酸碱对，则它们的离解常数K^θ_a和K^θ_a之间的正确关系是（）。

A.A

B.B

C.C

D.D