小企业的内部财务分析包括（）。 A．小企业获利能力分析  B．小企业短期偿债能力分析

足阳明胃经的郄穴是

A．地机
B．养老
C．外丘
D．郄门
E．梁丘

在临床上，BPRS主要适用于（）的评定。

A.中度精神病性症状

B.重度精神病性症状

C.轻度精神病性症状

D.所有的精神病性症状

Have you ever wondered why birds sing? Maybe you thought that they were just happy．After all, you probably sing or whistle when you are happy．

Some scientists believe that birds do sing some of the time just because they are happy．However, they sing most of the time for a very different reason．Their singing is actually a warning to other birds to stay out of their territory．

Do you know what a "territory" is? A territory is an area that an animal, usually the male, claims as its own ．Only he and his family are welcome there ．No other families of the same species are welcome．Your yard and house are your territory where only your family and friends are welcome．If a stranger should enter your territory and threaten you, you might shout．Probably this would be enough to frighten him away．

If so, you have actually scared the stranger away without having to fight him．A bird does the same thing．But he expects an outsider almost any time, especially at nesting （筑巢） season．So he's screaming （高声尖叫） all the time, whether he can see an outsider or not．This screaming is what we call a bird's song, and it is usually enough to keep an outsider away．

Birds sing loudest in the spring when they are trying to attract a mate and warn others not to enter the territory of theirs．You can see that birds have a language of their own．Most of it has something to do with attracting mates and setting up territories．

小题1:Some scientists believe that most of the time birds' singing is actually

A．an expression of happiness

B．a way of warning

C．an expression of anger

D．a language of their own小题2:What is a bird's "territory"?

A．A place where a bird may shout at the top of its voice．

B．A place where other bird families are not accepted．

C．An area for which birds fight against each other．

D．An area which a bird considers to be its own小题3:Why do birds keep on singing at nesting season?

A．Because their singing helps frighten outsiders away．

B．Because their singing helps get rid of their fears．

C．Because they want to find outsiders around．

D．Because they want to invite more bird friends．小题4:How does the writer explain birds' singing?

A．By comparing birds with human beings．

B．By reporting experimental results．

C．By describing birds'daily life．

D．By telling a bird's story．

甲公司本月销售情况如下：(1)现款销售100台，售价2000000元(不含增值税，下同)已入账：(2)需要安装的销售20台，售价400000元，款项尚未收取，但安装任务比较简单；(3)分期收款销售40台，售价800000元，第一期款项400000元(不含增值税)已收到入账；(4)附有退货条件的销售20台，售价460000元已入账，退货期3个月，退货的可能性难以估计。甲公司本月应确认的销售收入是 ( )元。

A．2400000

B．2800000

C．3260000

D．3660000

　　微晶玻璃是一种我国刚刚开发的新型的建筑材料，它的学名叫做玻璃陶瓷。微晶玻璃和我们常见的玻璃看起来大不相同。它具有玻璃和陶瓷的双重特性，普通玻璃内部的原子排列是没有规则的，这也是玻璃易碎的原因之一。而微晶玻璃像陶瓷一样，由晶体组成，也就是说，它的原子排列是有规律的。所以，微晶玻璃比陶瓷的亮度高，比玻璃韧性强。

　　现在，我们做一个微晶玻璃与天然石材的对比实验。我们把墨水分别倒在大理石和微晶玻璃上，稍等片刻，微晶玻璃上的墨汁可以轻易地擦掉，而大理石上的墨迹却留了下来。这是为什么呢大理石、花岗岩等天然石材表面粗糙，可以藏污纳垢，微晶玻璃就没有这种问题。大家都知道，大理石的主要成分是碳酸钙，用它做成建筑物，很容易与空气中的水和二氧化碳发生化学反应，这就是大理石建筑物日久变色的原因，而微晶玻璃几乎不与空气发生反应，所以可以历久常新。

　　专家介绍说，这项发明的突破点主要有两个，分别是原料的配比和工艺的设计。其中，工艺的设计是技术的关键。置备微晶玻璃首先要把原材料按照比例配好，放到窑炉里烧熔，等全部熔化之后，把溶液倒在冰冷的铁板上，这叫做淬火。淬火之后，原料已经变成了一块晶莹的玻璃，这一步是烧结的过程。现在，我们把玻璃捣碎，装入模具，抹平，再次放入窑炉，这次煅烧使它的原子排列规则化，是从普通玻璃到微晶玻璃的过程。

　　一般的废渣土中都含有制作微晶玻璃的大多数成分，我们通过电脑检测，确定现有原料的化学组成，添加所缺部分，大大降低了成本。微晶玻璃利用废渣、废土做原材料，有利于环境治理，可以变废为宝，与各地环保工作同步进行。

微晶玻璃与天然石材对比实验所得出的结论是（）。

A．天然石材表面粗糙，容易藏污纳垢

B．微晶玻璃光滑，不容易藏污纳垢

C．大理石容易与水和二氧化碳发生反应，因此日久变色

D．微晶玻璃几乎不与空气发生反应，所以可以历久常新