关于类毒素正确的是（） A.有免疫原性，无毒性 B.没有免疫原性，有毒性 C.其性质

某同学在网上查资料时发现如下一段诗歌：“我是中国人，我那黄河一样粗犷的声音，不光响在联合国的大厦里，大声发表着中国的议论；也响在奥林匹克的赛场上，大声高喊着‘中国得分’。当掌声把五星红旗送上蓝天，我骄傲，我是中国人!”对中国恢复在联合国合法权利的叙述错误的是[ ]

A．中国恢复在联合国的席位是大势所趋

B．第三世界力量崛起和支持

C．西方国家完全消除了对华的敌视政策

D．中国国际地位提高

下列陈述中正确的是（　　）

A．凸透镜一定成实像

B．凸透镜一定成虚像

C．凸透镜一定能成像

D．凸透镜能成虚像

国际奥委会是（）年成立的

婴幼儿常见的营养问题有（）。

A.蛋白质－热能营养不良

B.骨质软化症

C.高胆固醇血症

D.高脂血症

E.夜盲症

Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic (61) , following in the wake of the pamphlet and the book and in the (62) of the periodical. It was during the same time that the communications revolution (63) UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in (64) . It is important to do so.

It is generally recognized, (65) , that the introduction of the computer in the early 20th century, (66) by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately (67) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (68) , with display becoming sharper and storage (69) increasing. They were thought of, like people, (70) generations, with the distance between generations much (71) .

It was within the computer age that the term "information society" began to be widely used to describe the (72) within which we now live. The communications revolution has (73) both work and leisure and how we think and feel both about place and time, but there have been (74) view about its economic, political, social and cultural implications. "Benefits" have been weighed (75) "harmful" outcomes. And generalizations have proved difficult.

（61）处填（）。

A．means

B．method

C．medium

D．measure