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问题 选择题

生命世代相续，生生不息，这是通过生殖来实现的。下列属于无性生殖方式的是

A．家蚕的繁殖

B．苹果的嫁接繁殖

C．青蛙的繁殖

D．鸟类的繁殖

答案

答案：B

嫁接是人工营养繁殖常用的方法，没有经过两性生殖细胞的结合过程，属于无性生殖。

填空题

JT-C系列机车信号接线盒具有（）机车信号测试仪测试接口.
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完形填空。
     The moment happened 30 yours ago but it was still fresh in my memory. I was a college
freshman and had ___1__up most of the night before laughing and talking with friends.
Now just before my first __2__of the day my eyelids were feeling heavier and heavier and
my head was drifting down to my desk to make my textbook a __3__. A few minutes nap
(小睡)time before class couldn't __4__, I thought.
     BOOM! I lifted my head suddenly and my eyes opened wider than saucers. I looked
around with my __5_beating wildly trying to find the cause of the __6__. My young
professor was looking at me with a boyish(孩子气的)smile on his face. He had __7__
dropped the textbooks he was carrying onto his desk. "Good morning!", he said still __8__.
"I am glad to see everyone is __9__. Now let's get started. "
     For the next hour I wasn't sleepy at all. It wasn't from the __10__of my professor's
textbook alarm clock either. It was instead from the __11__discussion he led. With
knowledge and good   __12__
he made the material come __13__. His insight was full of both wisdom and loving-kindness.
And the enthusiasm and joy that he __14__with were contagious(有感染力的). I __15__
the classroom not only wide awake, but a little __16__and a little better as well.
     I learned something far more important than not   __17__in class that day too. I learned
that if you are going to do something in this life,do it well,do it with __18__. What a
wonderful place this would be if all of us did our work joyously and well. Don't
sleepwalk(梦游)your way through __19__then. Wake up! Let your love fill your work.
Life is too __20__not to live it well.
( )1．A. took
( )2．A. class
( )3．A. platform
( )4．A. benefit
( )5．A. heart
( )6．A. trouble
( )7．A. angrily
( )8．A. smiling
( )9．A. active
( )10．A. sound
( )11．A. fascinatin
( )12．A. gesture
( )13．A. strange
( )14．A. taught
( )15．A . decorated
( )16．A. clearer
( )17．A. discussing
( )18．A. joy
( )19．A. work
( )20．A. hard


B. divided
B. test
B. pillow
B. help
B. mind
B. noise
B. carelessly
B. talking
B. curious
B. shock
B. convincing
B. sense
B. natural
B. spread
B. filled
B. smarter
B. speaking
B. speed
B. life
B. complex


C. stayed
C. task
C. carpet
C. last
C. thought
C. failure
C. deliberately
C. complaining
C. present
C. interruption
C. puzzling
C. humor
C. handy
C. combined
C. left
C. quieter
C. cheating
C. aim
C. journey
C. short


D. put
D. lecture
D. wall
D. hurt
D. head
D. incident
D. accidentally
D. shouting
D. awake
D. blow
D. encouraging
D. design
D. alive
D. started
D. entered
D. stronger
D. sleeping
D. de termination
D. college
D. simple
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