下列各项中，（）纳入单位银行结算账户管理。 A.个体工商户凭营业执照以字号开立的银行

从分类角度看，下列变化中有一种变化与其它三种变化有本质区别，这种变化是（　　）

A．水结成冰

B．石灰石煅烧成石灰

C．铁矿石冶炼变为生铁

D．用锌粒与盐酸反应放出氢气

篇章结构。

     __1__ He had more money than he could ever spend,and he was admired and looked up to by his

community.__2__ He wasn't happy.All his life he had been pursuing happiness and striving(奋斗)for

happiness,but he had never been able to find it.

     Then one day he heard about a hidden temple in Nepal that had a special room that contained the

secret of happiness.__3__ After many years of searching and countless hardships he arrived there.He was tired and penniless,but he knew that none of that mattered now because he had found the temple.He asked a wise,smiling monk(和尚)if he could enter the special room.The monk agreed and showed him the stairs

leading to the room.__4__ He stared into the room with sunlight streaming through the window and saw

what he had come so far to find.There hanging on the wall was the secret of happiness.The man gazed at

his reflection in the mirror and laughed.

     __5__ Happiness is a choice that we can make.Don't spend the rest of your life searching the world for happiness then.Just look in the mirror and laugh.Just let the happiness flow from your heart,mind,and soul

until it fills your life and the lives of all those around you.

A．He immediately sold all that he owned and set out to find this hidden temple.

B．The man found the secret of happiness at last.

C．But he knew that something was missing in his life.

D．He climbed them with legs shaking with expectation and slowly opened the door.

E．There once was a very wealthy and successful man.

F．It is time that we all realized that we were the secret of our own happiness.

G．It was difficult to find the temple in Nepal.

钒的用途十分广泛，有金属“维生素”之称。某工厂为了从含有杂质的VOSO₄样品中回收得到催化剂V₂O₅，设计流程如下：

请回答下列问题：

（1）步骤①所得废渣的成分是          （写化学式）。NH₄VO₃在焙烧前要洗涤2-3次，该步操作方法为                          。

（2）步骤②、③的变化过程可简化为（下式R表示VO²⁺，HA表示有机萃取剂）：

R₂(SO₄)_n (水层)+ 2nHA（有机层）2RA_n（有机层） + nH₂SO₄  (水层) 

步骤②中萃取时必须加入适量碱，其原因是                                      。

步骤③中X试剂为           。

（3）⑤的离子方程式为                                      。

（4）该工艺流程中，可以循环利用的物质有    和    。

（5）若取VOSO₄样品wg，测得消耗a mol·L^—1氯酸钾溶液VmL（氯酸钾还原产物为氯化钾），则1kg样品理论上可制得的V₂O₅质量是              g（用含w、V的代数式表示）。

Small, Imperfectly Formed

One has to look a long time for an American politician of any political stripe who has failed to laud small businesses. Still, many have little clue as to what makes such businesses succeed or fail.
Federal agencies aimed at helping small business, such as the Small Business Administration and the Minority Business Development Agency, have been around for half a century, yet persistent differences remain between the performance of businesses founded by white, male entrepreneurs and the rest. Blacks are less likely to be self-employed, for example, and when they are their businesses, on average, have lower sales and profits than do their white-or Asian-owned counterparts. If researchers could explain the causes of these differences, policy-makers could (at least in theory) supply small businesses with more useful help.
Two researchers for the Census Bureau’s Centre for Economic Studies, Ron Jarmin and C.J. Krizan, recently published a working paper attempting to understand demographic differences behind small businesses’ success and failure. They concentrated on the years 2002 to 2005, with three databases at their disposal: the Survey of Business Owners, conducted every five years; the Longitudinal Foreign Trade Transaction Database, which includes every US export transaction between 1992 and 2005; and a database co-developed by Mr. Jarmin, which allowed the authors to track whether the owners of the firms in their sample had prior experience being their own bosses. By drawing from on the power of the Census’s data collection efforts, the authors hoped to create a more nuanced picture of business survival.
Some of their findings were not terribly surprising. A firm’s chances of survival, regardless of the race or sex of its owner, decreased in poorer areas; and the better the education of the founder, the more likely it was to succeed. Businesses owned by Asians, Hispanics, or Pacific Islanders were more likely to be exporters. Older entrepreneurs were more likely to use personal savings to start their businesses; younger owners were more likely to have to close up shop during the study period than were their middle-aged rivals.
However, the data also confirmed that black-and female-owned businesses tended to perform worse than the average. They were also less likely to have been funded by bank loans. Still, the businesses that survived, regardless of the owner’s race, tended to add employees at similar rates. Furthermore, after controlling for factors such as the education and race of the owner, there was no statistically significant difference in firms’ abilities to expand into different locations. Finally, black entrepreneurs were more likely to have a history of self-employment than their white counterparts. Messrs Jarmin and Krizan’s paper is not the first to suggest that black entrepreneurs, less likely to have other business owners in their family or personal networks, tend to "start small" when they venture out on their own.
Most researchers get to end their papers by speculating, usually without much fear of consequence, as to the policy implications of their work. The authors of this paper, not wishing to imply that the Census Bureau might have policy opinions, declined to do so. But the reader can make some guesses. One is that mentorship programmes may be particularly useful for promoting entrepreneurship among blacks. Another is that reaching out to businesses based on the owner’s race might be less useful than supporting businesses in poorer areas. And small businesses of all stripes would be helped by improving that other institution lauded by politicians: America’s education system.

One of the problems black owners and female owners faced was ______.
A. poor education B. low work efficiency
C. lack of family backups D. difficult access to bank loans

玉米缺钾时老叶从（）开始变褐焦枯。

A.叶尖

B.叶柄

C.叶鞘

D.叶脉