患者突然昏仆，不省人事，口吐涎沫，有痰声，苔白腻，脉滑，宜诊为（） A.痰阻心脉证

材料一

大事年表

材料二 冷战时期的批评家曾经指责一些军事联盟如北约组织和华约组织推动了高昂的军备竞赛，并使地区冲突一直有转变成超级大国之间核对抗的危险。冷战结束后，赞扬这些军事联盟具有控制冲突升级的能力却成为时尚。——（美）杰里·本特利等《新全球史》

苏联曾经是有用的敌人。美国相信，不仅要和苏联的军事力量竞赛，还要和苏联的成就竞赛……没有苏联的空间计划，美国人就不可能登上月球……——《美国新闻与世界报道》（1991年9月9日）

（1）从思想、社会和政党政治三个方面，分析戈尔巴乔夫的政治改革是如何导致苏联解体的。

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在测玻璃折射率实验中，操作步骤如下：

（1）先在白纸上画出一条直线aa′，代表两种介质的界面，过aa′上的O点画出界面法线NN′，并画出一条线段AO作为入射光线．

（2）把长方形玻璃砖放在白纸上，使它的长边跟aa′对齐．

（3）在线段AO上竖直地插大头针P₁、P₂，透过玻璃砖观察大头针P₁、P₂的像，调整视线方向，直到P₁的像被P₂挡住，再在观察的这一侧插大头针P₃、P₄，使P₃档住P₁、P₂，P₄档住P₁、P₂、P₃，记下P₃、P₄，的位置．

（4）移去大头针和玻璃砖，连接P₁、P₂做为入射光线，连接P₃、P₄做为折射光线，测量出入射角i与折射角r，填入表格中．

上述操作步骤中存在严重的缺漏，应做补充的是：

第______步，补充内容为______；

第______步，补充内容为______．

水电站的机组出力与水头流量成（）

A.正比关系

B.反比关系

C.等比关系

Americans have a great love for informality and nowhere is this better expressed than in their love for nicknames (昵称，绰号). Upon greeting strangers for the first time they will quickly introduce themselves by their nickname. These are shortened forms of their given name at birth and reflect the casual relationships which exist among friends and coworkers. Family names are hardly ever used in daily situations and the use of one’s father’s last name is saved only for rare and formal occasions.
In many traditional cultures the use of the family name is seen as a sign of respect. For Americans, however, it’s the nickname which creates an immediate intimacy between two people upon which to build a relationship. By speaking to another on a first name basis and using his nickname, walls are immediately torn down and equality between two people is established.
At work bosses will refer to their employees by their nicknames. Should an employer use a worker’s family name, you can be sure that some kind of correction or serious business will follow.
This love for nicknames can create a sense of closeness between people who are otherwise not related. Even the presidents of the United States have borne nicknames. Abraham Lincoln was known as Honest Abe. John F. Kennedy was known as Jack or JFK and William Clinton has no reservations in letting people know he prefers to be called Bill, but those who look upon him with disfavor may call him Slick Willy.
Not only people but cities often carry their own nicknames. Chicago is called the "Windy City" because of the p winds which come down from Canada throughout the year. New York City is considered the "Big Apple" for reasons which are still obscure to most people including many New Yorkers.
Not every nickname, however, is positive and some can be rather rude and insulting. If someone should demonstrate a certain negative characteristic, a label will soon be attached to describe that person in an unpleasant way.
Likewise a person’s physical traits which are very dominant may lead to nicknames but not necessarily to one’s liking or choice. A nickname, therefore, is a way of identifying or describing someone or something for better or worse.

Many traditional societies see the use of one’s family name as a sign of ______.

A. respect
B. distance
C. importance
D. gratitude

回油式喷油嘴的（）与（）方式有密切关系。