一般来说，______受前天膳食影响较小，是较恒定的尿液种类。A．任意尿 B．晨尿

不属于社会问题特征的是( )

A．普遍性和变异性
B．复合性和周期性
C．破坏性和集群性
D．暂时性和间歇性

雷诺综合征，指（趾）缺血，由白变紫变红，随后转暖，典型发作过程一般持续（）。

A.5分钟

B.10分钟

C.15分钟

D.20分钟

E.25分钟

W: Did you attend Alice’s presentation last night It was the first time for her to give a speech to a large audience.
M: How she could be so calm in front of so many people is really beyond me!
Q: What do we learn from the conversation().

A. Alice didn’t seem to be nervous during her speech.

B. Alice needs more training in making public speeches.

C. The man can hardly understand Alice’s presentation.

D. The man didn’t think highly of Alice’s presentation.

流行性出血热属于（）

A.有肾病综合征的动物源性出血热

B.无肾病综合征的动物源性出血热

C.蚊传性出血热

D.蜱传性出血热

E.传播途径不明的出血热

机关、事业单位的职工调到企业工作的工作年限与缴费年限如何衔接？