某分项工程的直接工程费仅为人工费，无材料费和机械费，人工费为600万元。.按该分项工

PDA患儿脉压增宽主要是由于（）

A.收缩压升高

B.收缩压降低

C.舒张压升高

D.舒张压降低

E.收缩压升高伴舒张压升高

小黄参加某旅行社组织的某地6日游，当地接待社租用一辆私人面包车和一位能说会道的司机。此人没有导游证，而且车况也很糟糕。在景点游客问他有关景点的知识，他一概不知，可讲起小道新闻和恶意的政治笑话却头头是道。其行为违反的是（）。

A.敬业爱岗，规范导游行为

B.爱国爱市，维护民族尊严

C.诚实尽责，保障游客利益

D.倡导文明，提升文明素质

阅读理解。

     Something in chocolate could be used to stop coughs and lead to more effective medicines, say UK

researchers.

     Their study found that theobromine, found in cocoa, was nearly a third more effective in stopping

coughs than codeine, which was considered the best cough medicine at present.

     The Imperial College London researchers who published their results online said the discovery could

lead to more effective cough treatment. "While coughing is not necessarily harmful (有害的) it can have

a major effect on the quality of life, and this discovery could be a huge step forward in treating this

problem," said Professor Peter Barnes.

     Ten healthy volunteers (志愿者) were given theobromine, codeine or placebo, a pill that contains no

medicine, during the experiment. Neither the volunteers nor the researchers knew who received which

pill. The researchers then measured levels of capsaicin, which is used in research to cause coughing and

as a sign of how well the medicine is stopping coughs.

     The team found that, when the volunteers were given theobromine, the capsaicin need to produce a

cough was around a third higher than in the placebo group. When they were given codeine they need only

slightly higher levers of capsaicin to cause a cough compared with the placebo.

     The researchers said that theobromine worked by keeping down a verve activity (神经活动), which

cause coughing. They also found that unlike some standard cough treatments, theobromine caused no side

effects such as sleepiness.

1. According to Professor Barnes, theobromine _____.

A. cannot be as effective as codeine

B. can be harmful to people's health

C. cannot be separated from chocolate

D. can be a more effective cure for coughs

2. What was used in the experiment to cause coughing? 

A. Theobromine.

B. Codeine.

C. Capsaicin.

D. Placebo.

3. We learn from the text that volunteers in the experiment _____.

A. were patients with bad coughs

B. were divided into the three groups

C. received standard treatments

D. suffered little side effects

4. Which of the following would be the best title for the text?

A. Codeine: A New Medicine

B. Chocolate May Cure Coughs

C. Cough Treatment: A Hard Case

B. Theobromine Can Cause Coughs

协议还款业务中，申请成功后，约定还款申请在下一个账单日后生效，自助还款申请在（）个工作日内生效。

A.存折

B.仅借记卡

C.仅准贷记卡

D.借记卡和准贷记卡

我国法律明确规定，对生产安全事故实行（）制度。

A.公了

B.私了

C.责任追究

D.宽大处理