下列有关乙醇与乙酸的说法中正确的是（ ） A．互为同系物 B．都显酸性 C．互

既是组织城市各种功能用地的“骨架”，又是城市进行生产活动和生活活动的“动脉”的是（）。

A.城市道路系统

B.城市交通系统

C.城市对外交通系统

D.城市交通管理系统

下列句子中，加点的词语使用不恰当的一句是

A．刚刚开通的可视电话，可以双向实时传输通话双方的语音和图像信号，实现人们打电话时既能闻其声、又能见其人的梦想，真可谓咫尺天涯。

B．在国家药监局主持核心业务的医疗器械司的两任司长，在半年时间内，先后都因涉嫌受贿被检察机关刑拘。看到这样的报道，令人触目惊心。

C．大城市的居室、办公楼、饭店或娱乐场所的污染程度已经不亚于室外，甚至有过之无不及。然而许多人对此并不很了解甚至是一无所知。

D．35年前，发达国家在联合国做出承诺——富国拿出国民生产总值的0.7%来援助穷国，但富国一味空谈，口惠而实不至，一直未兑现这一承诺。

(16分)乙酸丁酯（CH₃COOCH₂CH­₂CH₂CH₃）是具有果香味的香精，经酯化反应可进行乙酸丁酯的合成。有关物质的物理性质见右表。合成过程如下：第一步：将丁醇和过量的乙酸混合加热发生酯化反应；第二步：洗涤提纯；第三步：蒸馏提纯。

(1)上述是合成和提纯乙酸丁酯的有关装置图，请写出合成和提纯乙酸丁酯的操作顺序(填字母)C→F→   →   →   →     。

(2)C装置中除了装有1-丁醇和过量的乙酸外，还需要加入___________、___________。

乙酸过量的原因是__________________。装置C中冷凝管的作用是：            ；

(3)步骤F：酯化反应完成后，向卸下的烧瓶中加入25mL水的作用是_____ ___  _   。A装置中Na₂CO₃溶液的作用是_______                          。

(4)步骤E的操作要领是：①用一只手的手掌压住分液漏斗的塞子并握住分液漏斗；

②另一只手握住活塞部分；③                       。

（5）装置A的分液漏斗中液体分为两层，乙酸丁酯应在    （填上、下）层。

（6）第一步酯化反应过程中可能得到的有机副产物有______(写出两种物质的结构简式)。

“Eat local.” It’s one way to reduce human effect on the planet. Eating local means to try to buy and consume foods that are grown in places close to home. However, most of the food sold at supermarkets is not locally grown or produced. Trucks and planes deliver these foods from hundreds or thousands of miles away. During the transportation, greenhouse(温室)gases are produced, causing global warming. So the shorter the distance your foods must travel, the less the harm is done to the environment.

But how do you get local food if you live in a large city, hundreds of miles away from farms？Environmental health scientist Dickson Despommier and his students came up with the idea of a “vertical(垂直的)farm”.

A vertical farm is a glass-walled structure that could be built as tall as a skyscraper(摩天大楼). Since the garden is built upwards, rather than outwards, it requires much less space than an ordinary farm. The world is quickly running out of room for ordinary farming. Vertical farms could be a key to this situation. Despommier imagines a 30-story building with a greenhouse on every floor. The walls of the building would be clear, to allow crops to get as much sunlight as possible. Depending on a city’s water resources, Despommier thinks hydroponic(水培的) farming is another method for the vertical farm which needs no soil to grow plants.

Despommier says the hydroponic greenhouses would use a system that would use a city’s waste water and fill it with nutritions to make the crops grow. If this method works, it would provide food to a city and save millions of tons of water.

The idea of a vertical farm has attracted the attention of government officials around the world. Scott Stringer, a government official from New York City, thinks the city is suitable for the vertical farming. “Obviously we don’t have much land left for us,” Stringer said. “But the sky is the limit in Manhattan. ”

Despommier admits that there is still a lot of work to do to make vertical farms a reality. “But I think vertical farming is an idea that can work in a big way,” he says.

小题1:Why are people advised to eat local?

A．Because it means convenience(方便) to people.

B．Because it can help people save a lot of money.

C．Because local food has more nutrition.

D．Because it is environmentally friendly.小题2:Which is one of the vertical farm’s benefits when compared with ordinary farming?

A．It produces healthier food.

B．It does less harm to the cities.

C．It needs less space of the city.

D．It requires less transport costs.小题3:By saying “the sky is the limit in Manhattan”, Stringer means _____.

A．people can make full use of vertical space of Manhattan

B．there is a limit for using empty land in Manhattan

C．the height of buildings in Manhattan is limited

D．Manhattan can spread as far as possible小题4:What can we learn about the vertical farming in the passage?

A．No soil is needed to grow plants in a vertical farm.

B．It has solved the problem of the food shortage in a big way.

C．It is a 30-story building with a greenhouse on every floor.

D．Crops are mainly grown in the rainwater in a vertical farm.

企业对其他单位的投资占该单位有表决权资本总额的20%时，应采用权益法核算。 ( )