YJ19通常的烟丝回丝量为烟丝总供给量的（）％左右。

患者，男性，22岁，因右侧后牙隐痛不适4天，右侧面部肿胀2天求诊。查体：右侧下颌角处肿胀明显，局部压痛，皮温升高，波动感不显，牙关紧闭，口内右下颌第三磨牙初萌牙尖，牙冠大部分被牙龈覆盖，龈瓣充血水肿，龈瓣下有脓液溢出。

该患者最有可能的诊断为（）

A.右下颌第三磨牙冠周炎

B.右下颌肿瘤继发感染

C.右下颌边缘性骨髓炎

D.右下颌第三磨牙冠周炎继发咬肌间隙感染

E.右侧腮腺炎

2007年10月15日，村集体经济组织以10％的年利率从银行贷款80000元，用该项贷款全额于2008年1月1日购入一批幼牛，当年发生饲养费用36000元。2008年4月15日，村集体经济组织将该项银行贷款本息一次还清。2009年1月1日，该批幼牛成龄转为役牛，预计可使用10年，当年发生饲养费用45000元。

该批役牛2009年发生的饲养费用45000元应当计入（）账户。

A.生产（劳务）成本

B.其他支出

C.管理费用

D.经营支出

读下图回答下列各题.

小题1:图示地区可重点发展的经济作物是（   ）

A．天然橡胶

B．棉花

C．茶叶

D．甜菜小题2:与东北平原相比，该区农业生产的优势条件是  

A．土壤肥沃

B．地形平坦

C．水源充足

D．热量丰富小题3:该区国土整治所面临的主要课题是    

①水土流失 ②土地沙漠化   ③酸性土壤改良 ④盐碱地整治

A．①②

B．②③

C．①③

D．②④

关于获得性膜，下列说法错误的是（）

A.乃菌斑形成初始，在牙面上覆盖的一层均匀无细胞的薄膜

B.是细菌附着牙釉质表面的必需条件

C.具有选择性吸附能力

D.由菌斑微生物所分泌

E.来自唾液糖蛋白结构

When an invention is made, the inventor has three possible (1) of action open to him: he can give the invention to the world by publishing it, keep the idea (2) , or patent it.

A (3) patent is the result of a bargain (4) between an inventor and the state, hut the inventor gets a limited period of monopoly and publishes full details of his invention to the public after that period (5) .

Only in the most exceptional circumstances (6) the lifespan of a patent (7) to alter this normal process of events.

The longest extension ever (8) was to Georges Valensi; his 1939 patent for color TV receiver circuit was extended until 1971 because for most of the patent’s normal life there was no color TV to (9) and thus no hope for reward for the invention.

Because a patent remains permanently (10) after it has terminated, the shelves of the library attached to the (11) office contain details of literally millions of ideas that are free for anyone to use and, if (12) than half a century, sometimes even repatent. Indeed, patent experts often advise anyone (13) to avoid the high cost of conducting a search through (14) patents that the one sure way of violation of any other inventor’s right is to plagiarize a dead patent. Likewise, because publication of an idea in any other form (15) invalidates further patents on that idea, it is traditionally (16) to take ideas from other areas of print. Much modern technological advance is (17) on these presumptions of legal security.

Anyone closely (8) in patents and inventions soon learns that most "new" ideas are, in fact, as old as the hills. It is theft reduction to commercial practice, either through necessity or dedication, or through the availability of new technology, (19) makes news and money. The basic patent for the theory for magnetic recording dates back to 1886. Many of the original ideas behind television originate (20) the late 19th and early 20th century. Even the Volkswagen rear engine ear was anticipated by a 1904 patent for a cart with the horse at the rear.

10（）

A.public

B.secret

C.close

D.concealed