哪些原因引起电动机启动不良？

裸露病毒的结构是（）

A.核酸+包膜

B.核酸+衣壳+包膜

C.核酸+包膜+外膜

D.核酸+衣壳

E.衣壳+包膜

第三部分：闽读理解(共20小题；每小题2分，满分40分)

阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项，并在答题卡上将该项涂黑。

A

Prana, our beautiful golden retriever (金毛猎犬) whose name means "breath of life", isn't with us any more. She died of cancer several years ago. But, while sharing our home, she brought such joy and love into our lives that we still miss her.

There are so many wonderful stories about the love in this dog, but my favorite is the one that created an indelible image of how to graciously give what is needed without reserve (储备).

It was an autumn day in Minnesota. But the weather didn' t seem to know the difference between fall and winter. Unexpectedly, we were hit with a big snow fall, for which no one was prepared.

We have two apple trees in our backyard Prana loved apples. When she went outside, she'd grab an apple, stick it far back in her mouth, and sneak it into the house to save for enjoyment later. The apples had been on the ground and were often muddy so I wasn't always happy that Prana had brought them into the house. Sensing my disapproval, she would turn her head so I wouldn't see her hidden treasure. It was our little game.

On the day that it snowed too early in the season, Prana went outside and I watched her from the window. I noticed that she was crazily digging holes and bringing the apples to the surface so they could be seen above the snow. I wondered why she was doing this. She seemed to be entirely busy digging up as many apples as possible during her yard time.

When I called her back into the house, she had her usual one apple in her mouth. About five minutes later, I looked outside ---- the yard was completely covered with birds. Prana had dug up all those apples for her bird and squirrel friends to eat. She knew that they wouldn't have stored enough food to survive such an early winter!

Tears sprung to my eyes as I witnessed this beautiful act of unconditional love from an animal who taught us how to serve life with such grace.

56. We still miss Prana because______.

A. she liked playing with the birds      

B. she always brought apples into the house

C. she made our lives enjoyable and full of love 

D. she dug up apples for her bird friends

57. The underlined word indelible in Paragraph 2 means______.

A. unimportant      B. unbelievable     C. impossible        D. unforgettable

58. Prana dug up as many apples from the snow as possible so that______.

A. she could help her owner store away many apples

B. her bird and squirrel friends could have food in cold weather

C. she could have fun in her yard time

D. she could have something to play with in the house

59. I was deeply moved by Prana because______.

A. she gave what is needed with grace

B. she dug up so many apples in such cold winter

C she gave unconditional love to me with such grace

D. she tried her best to save the birds from the snow

某工作第4周之后的计划进度与实际进度如下图所示，从图中可获得的正确信息有（）。

A．到第3周末，实际进度超前

B．在第4周内，实际进度超前

C．原计划第4周至第6周为均速进度

D．第6周后半周末进行本工作

E．本工作提前1周完成

铁碳合金中基本组织是哪些？并指出哪个是单相组织、哪个是双相混合组织。

降低安全库存的基本策略和具体措施。