汇票是（）签发的，委托付款人在见票时或者在指定日期无条件支付确定的金额给收款人或者持

某校办工厂现在年产值是15万元，计划今后每年增加2万元。

（1）写出年产值y（万元）与年数x（年）之间的函数关系式；

（2）画出函数图象；

（3）求5年后的产值。

土质改良是防治管涌与流沙(土)的基本措施之一，常用的方法有()。

A.注浆法

B.高压喷射法

C.搅拌法

D.合成法

E.冻结法

阅读理解。

     Surface Exploration. Robots make great explorers on planets,moons,and other landing areas.

Aside from Earth,just about every surface in the solar system is unsafe for humans to explore.The

air on most other planets is insufficient for humans to breathe,making it necessary to wear a space

suit and oxygen equipment.The temperatures on these surfaces are much too hot or much too cold

for any humans to withstand.Plus there would be complications with radiation,weather,and a lack

of gravity.Robots have much less limitation in these areas and can survive much longer under these

conditions.

     Data Collection. Robots are designed for collecting scientific data.Robots are also able to

perform many tasks at one time and can process information much quicker and more efficiently.

Important scientific projects from detecting minerals,analyzing ground samples,and finding water

are all performed much quicker and more accurately(精确地)by robots.

     Cost Effective. The use of robots has made the cost of space exploration much less expensive

than it would cost for humans to do the work.In order to successfully send humans into space we

would need to build a vehicle that can not only carry humans,but also have enough food and water to

keep them alive for the duration of the trip.Moreover,robots have no problems working for hours on

end.Robots never complain,they don't require food or water,and they never need a bathroom break.

     Space Travel. Over the past 30 years or so there have been many different types of robots used

successfully in the exploration of space.Perhaps the most famous and successful robots are the Spirit

and Opportunity who have both been exploring the surface of Mars.They have both been very

successful with experiments on soil and rocks and have even found evidence of water in Mars' history.

1．According to the passage,which of the following is NOT true?

A．The use of robots in space exploration costs more than the use of humans.

B．It may be dangerous for human to explore the solar system except the earth.

C．Both the Spirit and Opportunity have found the evidence of water in the Mars.

D．Many different types of robots have explored the space successfully.

2．Which column of the passage could come from?

A．Education.  

B．Finance.

C．Travel.  

D．Science.

3．The underlined phrase "withstand" most probably means "________"．

A．arise  

B．bear

C．defeat  

D．diverse

4．What is the writer's attitude in writing this passage?

A．Negative.  

B．Persuasive.

C．Subjective. 

D．Objective.

计算某年度与投资项目有关的经营成本时，不应从当年的总成本费用中扣除该年的 ( )。

A．折旧额

B．开办费摊销额

C．利息支出

D．所得税

右心室压力负荷(后负荷)加重见于

A．二尖瓣狭窄伴肺动脉高压
B．主动脉瓣狭窄
C．三尖瓣关闭不全
D．主动脉瓣关闭不全