在我国，大众投资群体仍主要以（）为主要金融资产。A．股票投资 B．银行储蓄 C．基金

梅尼埃病发作期，病人除有眩晕、耳鸣、耳闷胀感等症状外，常伴有短暂性意识障碍。

食物的营养成分不同其产生的热效应也不同，食物热效应约消耗本身产生能量最高的成分是（）

A.维生素

B.矿物质

C.蛋白质

D.脂肪

E.碳水化合物

下列关于全血、血浆和血清的概念叙述中，不正确的是（）

A.血清是血液离体后血块收缩所分离出的微黄色透明液体

B.血浆是不含纤维蛋白原的抗凝血

C.抗凝血一般是指血液加抗凝剂后的全血

D.脱纤维蛋白全血指用物理方法促进全部纤维蛋白缠绕于玻珠上而得到的血液

E.血清不含纤维蛋白原

阅读下面短文，并根据短文后的要求答题 (请注意问题后的词数要求)。

Every country has many good people who help to take care of others. Some high school and college students in the United States often spend many hours as volunteers in a hospital, orphanage (孤儿院) or home for the aged.

They read books to the people who must be in these places or they just visit them and play games or listen to their problems. Other young people volunteer to collect food or money, or they work in the homes of people who are sick or old. They paint, clean or repair their houses, do their shopping or mow their lawns. There is a group of volunteers to meet almost every need. For boys who no longer have fathers there is an organization called Big Brothers. College students and other men take these boys to baseball games or on fishing trips and help them to know about things that boys usually learn from their fathers. Every city has a number of clubs where boys and girls can go play games or to learn crafts. Some of these clubs have movies or organize short trips to the mountains, the beaches, museums or other places of interest. Most of these clubs use many high school and college students as volunteers because they still remember the problems of younger boys and girls. Volunteers believe that some of the happiest people in the world are those ________________________.

小题1:What does the passage mainly talk about? (within 10 words)

小题2:What do volunteers usually do in the home for the aged? (within 20 words)

小题3:Please fill in the blank in the last paragraph with proper words or phrases 小题4:What else would you do if you got a chance to be such a volunteer? (within 10 words)

小题5:What does the underlined word “they”( in the last but two line) refer to? (within 5 words)

患者男性，46岁，查泌尿系统B超提示双肾积水，行静脉肾盂造影（IVP）如图23所示。泌尿系统增强CT提示双肾盂及输尿管上段扩张，双输尿管中段呈外压性改变，伴腹主动脉周围软组织密度影包绕双侧输尿管。双肾MRI提示软组织部位呈弥漫短T₁、长T₂信号，考虑腹主动脉周围炎。

此病的主要发病机制为（）

A.免疫调节紊乱

B.癌前病变

C.医源性损伤

D.病毒感染

E.细菌感染

F.肿瘤转移