男，22岁。吞咽不畅，胸骨后沉重不适，症状时轻时重，时有呕吐，吐出食管潴留的食物。病史2年，用药症状无缓解，作食管钡剂造影，食管下端呈鸟嘴样狭窄。该病人诊断是(    )

糖尿病酮症酸中毒患者的呼吸节律最可能是

在东海大学研究生会举办的一次中国象棋比赛中，来自经济学院、管理学院、哲学院、数学院和化学院的5名研究生（每个学院1名），相遇在一起，有关甲乙丙丁戊5名研究生之间的比赛信息满足以下条件：
（1）甲与两名选手比赛过。
（2）化学学院选手与3名选手比赛过。
（3）乙不是管理学院的选手，也没有和管理学院的选手对阵过。
（4）哲学学院选手和丙比赛过。
（5）管理学院选手，哲学院选手，数学学院选手都相互交过手。
（6）丁与一名选手比赛过。
根据以上条件，丙来自哪个学院？

某飞机的翼展为63m，主起落架外轮外侧间距为15m，则与之相适应的飞行区指标II为（ ）。

符合防烟排烟系统安装要求的是（   ）。

新学期，学校要求各班级布置班级文化，这属于(  )

肝性脑病口服乳果糖的主要作用是(      )

Passage1

In many of the developing countries in Africaand Asia, the population is growing fast. The reason for this is simple: Womenin these countries have a high birth rate - from 3.0 to 7.0 children per woman.The majority of these women are poor, without the food or resources to care fortheir families. Why do they have so many children? Why don't they limit thesize of their families? The answer may be that they often have no choice. Thereare several reasons for this.

Onereason is economi

In atraditional agricultural economy, large families are helpful. Having morechildren means having more workers in the fields and someone to take care ofthe parents in old age. In an industrial economy, the situation is different.Many children, do not help a family; instead, they are an expense. Thus,industrialization has generally brought down the birth rate. This was the casein Italy, which was industrialized quite recently and rapidly. In the earlypart of the twentieth century, Italy was a poor, largely agricultural countrywith a high birth rate. After World WarⅡ, Italy's economy was rapidly modernized and industrialize

By theend of the century, the birth rate had dropped to 1. 3 children per woman, theworld's lowest.

However,the economy is not the only important factor that influences birth rate. SaudiArabia, for example, does not have an agriculture-based economy, and it has oneof the highest per capita incomes in the worl

Nevertheless,it also has a very high birth rate. Mexico and Indonesia, on the other hand,are poor countries, with largely agricultural economies, but they have recentlyreduced their population growth.

Clearly,other factors are involve

Themost important of these is the condition of women. A high birth rate almostalways goes together with lack of education and low status for women. Thiswould explain the high birth rate of Saudi Arabia. There, the traditionalculture gives women little education or independence and few possibilitiesoutside the home. On the other hand, the improved condition of women in Mexico,Thailand, and Indonesia explains the decline in birth rates in these countries.Their governments have taken measures to provide more education andopportunities for women.

Anotherkey factor in the birth rate is birth control. Women may want to limit theirfamilies but have no way to do so. In countries where governments have madebirth control easily available and inexpensive, birth rates have gone down.This is the case in Singapore, Sri Lanka, and India, as well as in Indonesia,Thailand, Mexico, and Brazil. In these countries, women have also been providedwith health care and help in planning their families.

Thesetrends show that an effective program to reduce population growth does not haveto depend on better economic conditions.3 It can be effective if it aims tohelp women and meet their needs. Only then, in fact, does it have any realchance of success.       (495 words)

Saudi Arabia is mentioned in the passage because it shows that _______.

汉族（　　）民居一般遵循“小河一房屋一街道一房屋”的建筑格局。

有关酶竞争性抑制剂特点的叙述，错误的是

2020 年 2 月，药品上市许可持有人与药品生产企业签订协议，委托其生产并销售药品。药品监督管理部门应当对该行为作出的处理是（      ）