比转数在（）的离心泵称为低比转数泵。 A.50～80 B.80～150 C.150～

下面哪项正确()

A．有早接触时该

B．有骨下袋时该调

C．牙齿磨损时该调

D．有刨伤症状时该调

E．以上都不对

伴有抑郁或焦虑的精神分裂症应选用：

A．氯丙嗪

B．丙米嗪

C．氟哌啶醇

D．五氟利多

E．氯普噻吨

中医外科内治法的总则是（）

A.温、托、补

B.清、消、补

C.清、补、托

D.消、通、补

E.消、托、补

阅读理解

     Barbara Morgan's lifelong dream has always been to travel into space.  On August 8,   2007,   her

wish came true.  The former teacher was one of seven crewmembers on the Space Shuttle Endeavour,   which flew into space from NASA's Kennedy Space Station in Florida.  

      Morgan taught at a primary school in Boise from 1975 to 1998 - with some time off for astronaut

training.  In 1985,   she was chosen as a backup for Christa McAuliffe,   who was to be the first teacher

in space.  On January 28,   1986,   the Space Shuttle Challenger exploded just 73 seconds after takeoff

killing McAuliffe and the other six crewmembers.  

      After the Challenger accident,   Morgan continued to teach.  In 1998,   she was asked to become

an astronaut.  Morgan's mission aboard Endeavour includes overseeing the move of 5,   000 pounds of

goods from the shuttle to the International Space Station and operating the shuttle's robotic arm.  

      Morgan gave students an unusual class after she was in space.  Morgan's outofthisworld class was

broadcast live on NASA television.  Her husband Clay Morgan said he couldn't help but smile as he

watched her talk to students.  "I'm just so proud of her and how she's going to do all this and do the

work of an astronaut as well as a teacher,   " he said.  "She just kept telling me how unbelievable it was

to be in space and I think it's much better than she expected. " One student asked Morgan how being a

teacher compared to being an astronaut.  "We explore,   we discover and we share,   " she said.  "The

great thing about being a teacher is you get to do that with students,   and the great thing about being an

astronaut is you get to do it in space.  These are both wonderful jobs. "

      The 25minute questionandanswer meeting also included the astronauts entertaining students by

swallowing floating juice bubbles and playing with PingPong balls.  

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

A.  The First Female Astronaut

B. Space Shuttle Endeavour

C. An Unusual Class

D. Barbara Morgan's Lifelong Dream

2. The underlined word "backup" in the second paragraph most probably means "________".  

A. someone as a replacement

B. someone as a volunteer

C. someone as a teacher

D. someone as a supporter

3. What can we learn from what Barbara Morgan said to the student in Paragraph 4?

A. Getting to do with students is much greater.  

B. Being a teacher is as great as being an astronaut.  

C. An astronaut's life is more wonderful.  

D. Being a teacher is quite different from being an astronaut.  

4. Clay Morgan's attitude towards his wife's being an astronaut was that of ________.  

A. surprise  

B. pride

C. unconcern  

D. worry

异化扩散与简单扩散的主要区别在于

A．前者需要能量，后者不需要
B．前者需要载体，后者不需要
C．前者没有特异性，后者有特异性
D．前者不需能量，后者需要
E．前者没有饱和性，后者有