城市道路横断面设计原则是什么？

请你写出一个有一根为1的一元二次方程：______；方程x²-5x=0的解是______．

属于稳定性骨折是

A．横行骨折

B．斜形骨折

C．粉碎骨折

D．多段骨折

E．螺旋形骨折

已知反应的，下列叙述正确的是（）。

A.由于，随着反应的进行，PC逐渐增大，pA、pB逐渐减小，平衡常数逐渐增大

B.升高温度，使增大，减小，将导致平衡向左移动

C.加入催化剂，同等程度加快正、逆反应的速率，加速达到平衡

D.增加压力，使pA、pB增大，增大，而平衡左移

Although there are many skillful Braille readers, thousands of other blind people find it difficult to learn that system. They are thereby shut (1) from the world of books and newspapers, having to (2) on friends to read aloud to them.

A young scientist named Raymond Kurzweil has now designed a computer which is a major (3) in providing aid to the (4) .His machine, Cyclops, has a camera that (5) any page, interprets the print into sounds, and then delivers them orally in a robot-like (6) through a speaker. By pressing the appropriate buttons (7) Cyclops’s keyboard, a blind person can "read" any (8) document in the English language.

This remarkable invention represents a tremendous (9) forward in the education of the handicapped. At present, Cyclops costs $ 50,000. (10) , Mr. Kurzweil and his associates are preparing a smaller (11) improved version that will sell (12) less than half that price. Within a few years, Kurzweil (13) the price range will be low enough for every school and library to (14) one. Michael Hingson, Director of the National Federation for the Blind, hopes that (15) will be able to buy home (16) of Cyclops for the price of a good television set.

Mr. Hingson’s organization purchased five machines and is now testing them in Maryland, Colorado, Iowa, California, and New York. Blind people have been (17) in those tests, making lots of (18) suggestions to the engineers who helped to produce Cyclops.

"This is the first time that blind people have ever done individual studies (19) a product was put on the market," Hingson said. "Most manufacturers believed that having the blind help the blind was like telling disabled people to teach other disabled people. In that (20) , the manufacturers have been the blind ones.

11（）

A.but

B.than

C.or

D.then

【背景材料】

某建设项目，建设期为2年，运营期为8年，项目建设投资(PF含固定资产投资方向调节税、建设期贷款利息)总额为3100万元，预计全部形成固定资产。固定资产折旧年限10年，按平均年限法计提折旧，残值率为5%，在运营期末收回余值。

建设项目发生的资金投入、收益及成本情况见表3-2。建设投资贷款年利率为10%，按季计息，建设期只计息不还款；还款方式为运营期(前6年)按每年等额本息(本金与利息之和)偿还，利息按年收取。

假定销售税金及附加的税率为6%，所得税税率为33%，行业基准投资收益率为15%。

【问题】