对进行胃镜检查的患者下列哪项护理措施不正确（） A.检查前禁食12小时 B.检查前半

下列各选项中，加点的成语使用恰当的一项是（　　）

A．集宁一中全体教师以无所不为的勇气，克服重重困难将一所不足三千人学校创建成中国百强中学，并创造着一个又一个的奇迹。

B．英勇而机智的荆轲策划了一个有始有终的行动方案，为了吸引秦王赢政上钩,必须砍下樊於期的头颅，作为看见时奉献的礼品。

C．放眼望去，满山的杜鹃花姹紫嫣红，真是美不胜收。

D．2009年8月美国新任总统奥巴马首次访日，可笑的是他与日本天皇见面时竟行九十度大礼，虔诚之至让人忍俊不禁。

毛细血管前括约肌活动的主要影响因素是()

A．交感神经末梢释放的去甲肾上腺素

B．组织局部代谢产物

C．肾上腺髓质释放的肾上腺素

D．交感舒血管纤维释放的乙酰胆碱

E．肾脏近球细胞释放的肾素

“生命载体”和“非生命载体”分别所指的是：

A．消费者和物质产品

B．人的头脑和书籍资料

C．运用知识的人和精神产品

D．读书、授业等和论著、设计等

Reading comprehension.

     Mail carriers will be delivering some good news and some bad news this week.

     The bad news: Stamp prices are expected to rise 2 cents in May to 41 cents, the Postal Regulatory

Commission announced yesterday. The good news: With the introduction of a "forever stamp", it may

be the last time Americans have to use annoying 2-or 3-cent stamps to make up postage differences.

     Beginning in May, people would be able to purchase the stamps in booklets of 20 at the regular rate

of a first-class stamp. As the name implies, "forever stamps" will keep their first-class mailing value

forever, even when the postage rate goes up.

     The new "forever stamp" is the United States Postal Service's (USPS) answer to the complaints about

frequent rate increases. The May increase will be the fifth in a decade. Postal rates have risen because

of inflation (通货膨胀), competition from online bill paying, and the rising costs of employee benefits,

including healthcare, says Mark Saunders, a spokesman for USPS.

     The USPS expects some financial gain from sales of the "forever stamp" and the savings from not

printing as many 2-or 3-cent stamps. "It's not your grandfather's stamp," says Mr. Saunders. "It could

be your great-grandchildren's stamp."

     Other countries, including Canada, England, and Finland use similar stamps.

     Don Schilling, who has collected stamps for 50 years, says he's interested in the public's reaction.

"This is an entirely new class of stamps," Mr. Schilling says. He adds that he will buy the stamps because

he will be able to use them for a long period of time, not because they could make him rich-the volume

printed will be too large for collectors. "We won't be able to send our kids to college on these," he says,

laughing.

     The USPS board of governors has yet to accept the Postal Regulatory Commission's decision, but

tends to follow its recommendations. No plans have been announced yet for the design of the stamps.

1. The main purpose of introducing a "forever stamp" is _____.

A. to reduce the cost of printing 2-or 3-cent stamps

B. to help save the consumers' cost on first-class mailing

C. to respond to the complaints about rising postal rates

D. to compete with online bill paying

2. By saying "It could be your great-grandchildren's stamp", Mr. Saunders means that forever stamps _____.

A. could be collected by one's great-grandchildren

B. might be very precious in great-grandchildren's hands

C. might have been inherited from one's great-grandfathers

D. could be used by one's great-grandchildren even decades later

3. Which of the following is true according to the passage?

A. The investment in forever stamps will bring adequate reward.

B. America will be the first country to issue forever stamps.

C. The design of the "forever stamps" remains to be revealed.

D. 2-or 3-cent stamps will no longer be printed in the future.

4. What can be concluded from the passage?

A. With forever stamps, there will be no need to worry about rate changes.

B. Postal workers will benefit most from the sales of forever stamps.

C. The inflation has become a threat to the sales of first-class stamps.

D. New interest will be aroused in collecting forever stamps.

故障树分析的基本程序包括（）。

A.熟悉系统

B.确定目标值

C.确定顶上事件

D.研究故障类型的影响

E.定性分析