根据《会计从业资格管理办法》的规定，会计从业资格证书一经取得，在（）有效。 A.全省

下面文章有5处需要添加小标题。请从以下选项（A、B、C、D、E和F）中选出符合各段意思的小标题。选项中有一项是多余选项。

A. Varieties of college dictionaries

B. Accessing electronic dictionaries

C. Elements under a dictionary entry

D. Complete editions of dictionaries

E. Using dictionaries for particular fields

F. Features (特点) of college dictionaries

小题1:______________              

You’re probably most familiar with college dictionaries, often called abridged dictionaries．Although abridged means “shortened” , these dictionaries contain more than 150,000 entries and provide detailed definitions that are sufficient for most college students and general users. College dictionaries also contain separate lists of abbreviations, biographical and geographical names, foreign words and phrases, and tables of measures. Webster’s II New Riverside University Dictionary and the American Heritage Dictionary of the English Language are college dictionaries.

小题2:______________              

Unabridged dictionaries contain as many as 500,000 entries and provide detailed definitions and extensive word histories (etymologies). These dictionaries, possibly in several volumes and mostly found in libraries, are excellent sources for scholarly inquiries. Unabridged dictionaries include the Oxford English Dictionary and the Random House Dictionary of the English Language.

小题3:______________              

A dictionary entry has many elements: multiple definitions, syllabication (音节划分), preferred spelling and pronunciation (some words have more than one acceptable spelling and pronunciation) , and part-of-speech labels. Some entries also include plurals, capitalized forms, synonyms, antonyms, and derivatives. Americanisms and etymologies may be provided along with usage notes, cross-references, and idioms.

小题4:______________              

If you prefer using the dictionary on a computer, you can obtain CD-ROM versions of many major dictionaries. In addition, you can access numerous electronic dictionaries, such as WW Webster’s Dictionary, on the Internet. Online dictionaries allow you to enter a search word (you even get help with spelling) to see a definition, and sometimes even an illustration. Online dictionaries also offer additional features, such as word games, language tips, and amusing facts about words. Some online dictionary services allow you to access numerous dictionaries, both general and specialized.

小题5:______________              

Specialized dictionaries provide in-depth information about a certain field. For example there are dictionaries for the specialized vocabularies of law, computer technology, and medicine. In addition, there are dictionaries of synonyms, clichés, slang, and even regional expressions, such as the Dictionary of American Regional English (DARE). There are also dictionaries of foreign languages, famous people’s names, literary characters’ names and place names.

患者，女，39岁，6个月前因外伤致一上前牙脱落，今要求烤瓷桥修复。口腔检查：右上中切牙缺失，间隙无明显异常，牙槽嵴高度无明显异常，较平整。左上中切牙近中切角缺损，未露髓，探稍敏感，叩诊阴性，无松动。右上侧切牙牙冠完好，叩诊阴性，无松动。上下前牙牙龈轻度红肿，易出血，可见少量菌斑及牙石，余牙未见明显异常。

下列哪项关于右上侧切牙金瓷冠牙体预备的要求是正确的（）

A.切端磨除2mm

B.唇面磨除2mm

C.牙体预备分次磨除

D.唇面龈边缘在龈沟底

E.唇面龈边缘在龈上

在下列选项中， ______不是一个算法一般应该具有的基本特征。

A．确定性

B．可行性

C．无穷性

D．拥有足够的情报

螺旋槽丝锥有什么优点？

软件工程开发的可行性研究是决定软件项目是否继续开发的关键，而可行性研究的结论主要是关于______。