会计作为反映和监督一个单位经济活动的一种管理工作，其基本功能包括( )。 A．补偿

夏商西周时期，奴隶是农业和手工业部门的主要劳动者。

改正：_____________________________________________________________________________________

下列有关说法中错误的是（　　）

A．工业生产中的合成材料主要有：合成橡胶、合成纤维、塑料

B．农业生产中主要的化学肥料有：氮肥、磷肥、钾肥

C．日常生活中常给织物去污的方法有：酒精除圆珠笔油、食盐除水果汁、草酸除铁锈

D．人体主要的供能营养物质有：蛋白质、油酯、维生素

乙醇分子结构中各种化学键如图所示，关于乙醇在各种反应中断键的说明不正确的是（   ）

A．和金属钠反应时①键断裂

B．和浓硫酸共热到170 ℃时断键②和⑤

C．和浓硫酸共热到140 ℃时断裂②，其他键不断

D．在银催化下与O₂反应时断键①和③

李先生，21岁，咳嗽、咳脓痰10年，间歇咳血，体检左下肺背部闻及湿性啰音，有杵状指，诊断首先考虑

A．肺结核

B．支气管扩张

C．慢性肺脓肿

D．慢性支气管炎

E．肺气肿

Recycling Paper

The process of recycling paper can help to reduce deforestation and energy consumption on a significant scale. There are many different reasons why we should recycle paper products, and some of these are (26) in the paragraphs below.
Energy consumption will always be on the (27) as population levels grow, and so any manufacturing processes which help to reduce energy consumption are (28)
The Energy Information Administration (EIA) claim that there can be as (29) as a 40% energy saving when recycling paper over producing paper (30) the direct raw material.
Although recycling paper has many (31) , it also has its drawbacks. One of these drawbacks is that we cannot recycle the (32) paper product for eternity, as the fibers contained within the paper degrade over time, (33) their strength and length.
On (34) , an individual paper fiber can only be recycled a (35) of six times. Although this is a significant drawback, the six time recycling process will help to (36) a great deal of energy when you consider (37) much paper there is to be recycled.
If paper fibers can be recycled up to 6 times, and we recycled all paper products, this could help to (38) the intensity of deforestation for paper products up to a factor of 6.
With paper production said to (39) around 40% of harvested wood, and paper said to (40) around 90% wood, you can see how recycling paper is an important process for the (41) of our forests.
Today, the use of recycled paper products is on the increase, as more and more people begin to recycle paper (42) products around the home.
Although there are slight differences in the recycling processes of different (43) of paper products (e.g. corrugated, mixed paper, newspaper products), we are able to recycle just about any type of paper product around today.
The recycling logo helps to (44) a recyclable product and can also sometimes help to identify if the product contains any recycled material, in the form of a percentage. This helps a consumer to identify the (45) of recycling various products.

A. maximum B. deal C. number D. scale