架线时，架线车须匀速前进且不得超过每小时（）。A、5m B、10m C、5km

破膜时羊水呈金黄色见于

A．严重的胎儿宫内窘迫

B．胎儿宫内发育迟缓

C．死胎

D．过期妊娠

E．母儿血型不合

已知乳酸的结构简式为CH₃CH(OH)COOH。

试回答：

（1）乳酸分子中含有________和_________两种官能团（写名称）；

（2）乳酸与金属钠反应的化学方程式为___________________________________________________________________；

（3）乳酸与NaOH溶液反应的化学方程式为___________________________________________________________________；

（4）当乳酸和浓硫酸共热时，能产生多种酯类化合物，任意写出两种该类产物的结构简式_________________________________________________________________。

依据给定资料，就警用车辆存在的违规使用问题提出解决措施。
要求：分析条理，观点明确，语言流畅，对策可行。字数不超过350字。

Part 1

·Read thefollowingpassage, eight sentences have been removed from the article.
·Choose from the sentences A-H the one whichfits each gap.
·For each gap (1-8) mark one letter (A-H) on the Answer Sheet.
·Do not mark any letter twice.
The single, decisive factor that made it possible for mankind to settle in permanent communities was agriculture. (1) Once people could control the production of food and be assured of a reliable annual supple of it, their lives changed completely.
Fanning was a revolutionary discovery. (2) With more food available, more people could be fed. Populations therefore increased. The growing number of people available for more kinds of work led to the development of more complex social structures. (3)
Farming the world over has always relied upon a dependable water supply. For the earliest societies this meant rivers and streams or regular rainfall. (4) Later communities were able to develop by taking advantage of the rainy seasons.
All of the ancient civilizations probably developed in much the same way, in spite of regional and climatic differences. (5) Heavier pottery replaced animal-skin gourds as containers for food and liquids. Cloth could be woven from wool and flax. Permanent structures made of wood, brick, and stone could be erected.
The science of mathematics was an early outgrowth of agriculture. People studied the movements of the moon, the sun, and planets to calculate seasons. (6) With a calendar it was possible to calculate the arrival of each growing season. Measurement of land areas was necessary if property was to be a factor in farming and housekeeping. (7) All of the major ancient civilizations in Mesopotamia, Egypt, the Indus Valley, and China emerged in the 4th millennium BC. Historians still debate over which one emerged first. It may well have been the Middle East, in an area called the Fertile Crescent. This region stretches from the Nile River in Egypt northward along the coast of former Palestine, then eastward into Asia to include Mesopotamia. (8) This kind of larming depended on the reproduction of seed, normally from grain crops.
A. It not only made settlements possible and ultimately the building of cities but it also made available a reliable food supply.
B. Later came measures of value as commodity and money exchange became common.
C. In this area people settled along the riverbanks and practiced field agriculture.
D. After farming was developed in the Middle East in about 6500 BC, people living in tribes or family units did not have to be on the move continually searching for food or herding their animals.
E. As villages grew, the accumulation of more numerous and substantial goods became possible.
F. With a food surplus, a community could support a variety of workers who were not farmers.
G. The first great civilizations grow up along rivers.
H. In doing so they created the first calendars.

具有化生血液作用的气是

A．元气

B．宗气

C．营气

D．卫气