支配胸大、小肌的神经是（） A.胸长神经 B.胸前神经 C.肩胛背神经 D.锁骨下神

某大城市效区有一28层的一般钢筋混凝土高层建筑，设计使用年限为100年，如图6-15所示。地面以上高度为90m，平面为一外径26m的圆形。50年重现期的基本风压标准值为0.45kN／m，100年重现期的基本风压标准值为0.50kN／m，风荷载体型系数为0.8。

已知屋面高度处的风振系数β＝1.68，当按承载能力计算时，屋面高度处的风荷载标准值w（kN／m），与下列何项数值最为接近（）？

A.1.532

B.1.493

C.1.427

D.1.357

下面是我国古代某地区居民的职业结构表。这里的“某地区”应该是

A、汉代江南地区

B、唐代关中地区 

C、宋代太湖地区

D、明代苏杭地区

有流无风情况下的航迹推算，以下正确的是（）。

A．通过实测流压差的方法绘算

B．左舷受流流压差为负值。

C．通过作水流三角形绘算

D．具体情况具体对待，有时作水流三角形，有时利用实测流压差的方法。

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.

14（）

A.live

B.dead

C.working

D.recording

下列（）是还原－直接氧化工艺。

A、Chinsulf-DO

B、SCOT

C、Lo-Cat

D、Chinsulf-SDP