患者女性，45岁，有胃溃疡出血胃大部切除手术史，近半年来自觉四肢末端麻木，走路不稳，

假性完全栓塞的原因？（）

A.栓塞剂快速进入靶血管导致靶血管痉挛

B.过快注入大量栓塞剂导致其在血管腔内拥挤

C.使用了直径过小的弹簧钢圈

D.栓塞剂停留在导管内无法推注

E.以上都是

下列关于隐私的说法，正确的是 [     ]

A．与公共利益、群体利益无关的纯个人私事属于隐私

B．隐私包括私人信息、个人私事、私人领域等

C．隐私是不想让别人知道的不光彩的事

D．只要是与个人有关的事都是隐私

（ ）负责对输入计算机的会计数据进行审核，操作会计软件登记机内账簿，对打印输出的账簿、报表进行确认。

A．电算主管

B．电算审查

C．审核记账

D．数据分析

已知X 、Y、 Z 、W、 N是短周期中原子序数依次增大的五种主簇元素，通常情况下Y形成的单质为固体，其余的为气体。N是第三周期中阴离子半径最小的元素。Y元素能形成多种不同晶体类型的单质，其中的一种单质在电化学中常用做电极材料。W形成的一种单质具有强氧化性，可做漂白剂和消毒剂。根据上述信息回答下列问题。

（1）X元素是_________，Z元素是___________ 。（用元素符号表示）

（2）XYZ形成的晶体为分子晶体，写出其结构式___________；NaYZ的水溶液呈碱性，原因是__________________________ （用离子方程式表示）。

（3）X₂W₂是一种绿色氧化剂，写出其与酸性淀粉KI溶液反应的离子方程式 ________________________________ 。

（4）①利用Ⅰ、Ⅱ装置制取气体（K2关闭、K1打开），甲同学认为：利用Ⅱ装置可以收集X₂等气体，但不能收集W₂ 、ZW₂或ZW气体，其理由是________________。 

②乙同学认为：利用Ⅱ装置作简单改进（但不改变瓶口朝向），也可以收集W₂、ZW等气体，但不能收集ZW₂气体，其改进的方法是__________________。

③丙同学想利用上述装置设计实验确认H₂SO₄、H₂CO₃和H₂SiO₃的酸性强弱。（不必再选用其它酸性溶液，且通过一次实验就可以达到目的）实验时，K1关闭、K2打开。锥形瓶内装______固体，装置C(试管)中所盛的试剂是________；出现的现象是____________。

When an invention is made, the inventor has three possible courses of action open to him: he can give the invention to the world by publishing it, keep the idea secret, or patent it.

A granted patent is the result of a bargain made between an inventor and the state, by which the inventor gets a limited period of monopoly (垄断) and publishes full details of his invention to the public after that period terminates (终止).

Only in most exceptional circumstances is the life-span of a patent extended to alter this normal process of events.

The longest extension ever granted was to Georges Valensi: his 1939 patent for color TV receiver circuitry was extended until 1971 because for most of the patent’s normal life there was no color TV to receive and thus no hope of reward for the invention.

Because a patent remains permanently public after it has terminated, the shelves of the library attached to the patent office contain details of literally millions of ideas that are free for anyone to use and, if older than half a century, sometimes even re-patent. Indeed, patent experts often advise anyone wishing to avoid the high cost of conducting a search through live patents that the one sure way of avoiding violation of any other inventor’s right is to plagiarize a dead patent. Likewise, because publication of an idea in any other form permanently invalidates (使无效) further patents on that idea, it is traditionally safe to take ideas from other areas of print. Much modern technological advance is based on these presumptions of legal security.

Anyone closely involved in patents and inventions soon learns that most "new" ideas are, in fact, as old as the hills. It is their reduction to commercial practice, either through necessity of dedication, or through the availability of new technology, that makes news and money. The basic patent for the theory magnetic recording dates back to 1886. Many of the original ideas behind television originate from the late 19^th and early 20^th century. Even the Volkswagen rear engine car was anticipated by a 1904 patent of a cart with the horse at the rear.

The passage is mainly about ().

A. an approach to patents

B. the application for patents

C. the use of patents

D. the access to patents