重度至危重度哮喘患者．痰液粘稠咳不出来，最有效的祛痰方法是（）。 A.抽吸痰液 B.

为了明确上消化道出血的病因和部位，可选用哪项检查（）

A.双气囊三腔管

B.X线钡餐检查

C.胃镜

D.选择性腹腔动脉造影

E.以上都可以

一平面余弦波波源的振动周期T-0.5s，所激起的波的波长λ=10m，振幅为0.5m，当t=0时，波源处振动的位移恰为正向最大值，取波源处为原点并设波沿x轴正向传播，此波的波动方程为（）。

A.A

B.B

C.C

D.D

阅读理解。

     Last month, students from one hundred and three universities in eightyeight countries took part in

an international computer programming contest. The Battle of the Brains took place in Harbin, China. 

 __1__

     Jerry Cain, coach of Stanford University Team  California, says, "One of the programming problems

was trying to figure out how to break an arbitrary chocolate bar into a certain number of pieces of a

certain numb er of sizes and to do it as quickly as possible.    __2__"

     The students first listed the problems in order of difficulty.__3__ They designed ways to test their

solutions. And they wrote needed software systems.  Even the winning team from Shanghai Jiaotong

University in China was not able to solve all the problems within the given time limit.  Stanford's team

solved five problems and finished in the 14th place. Stanford was one of twentyone American universities

that took part in the contest this year.

     __4__ It began in 1970 at Texas A&M University. The contest quickly became popular in the

United States and Canada. It developed and grew as more and more schools took part in local and

area contests.

     The first final competition was held in 1977 at the Association for Computing Machinery Computer

Science conference. Today, a network of universities holds area competitions that send the winners to

the world finals, now organized by IBM. Contest spokesman Doug Heintzman says the world champions

receive prizes and scholarships.  __5__

A. The competitors show real interest in IBM.

B. Then they figured out the requirements of each.

C. And that's probably the simplest of all of them.

D. This competition is an opportunity to be recognized by famous universities from the world.

E. Threeperson teams from each school had five hours to solve eleven real world problems.

F. The official name of the Battle of the Brains is the ACM  International Collegiate Programming Contest.

G. They are also guaranteed an offer of employment with IBM.

某高速公路全长126.758km。某工程项目完工后，省交通工程质量监督站会同项目建设各方，分别对将交工验收的某合同段的路基、桥梁、隧道、路面、交通安全设施等工程分阶段进行了检验及评定工作，并编写完成工程质量检验评定报告。
根据场景，回答下列问题。

对于下列工程部位，不属于隐蔽工程的是( )。

A．湿软地基的换填层
B．路面面层
C．钢筋混凝土工程中的钢筋
D．挡土墙的基坑

一般情况下，培训费用应该包括实施计划所必需的（），也包括以其他有用方式运用该资本的（）。

A.固定成本；可变成本

B.固定成本；机会成本

C.资源成本；机会成本

D.资源成本；可变成本