物种间竞争的特点是什么

题型:问答题

问题:

物种间竞争的特点是什么

考点:专升本考试生态学基础专升本生态学基础
题型:问答题

当光束通过鸡蛋清水溶液时,从侧面观察到一条光亮的“通路”,说明鸡蛋清水溶液属于(  )

A.溶液

B.悬浊液

C.乳浊液

D.胶体

题型:问答题

某村2009年组建一农副产品加工企业,有职工七十余人,年产值近100万元,平均年利润5万元左右,生产发展缓慢,效益一般。由于企业建立时间不长、管理工作滞后、投入大、效益低,人、财、物资源浪费大、产品成本高、质量差,在市场上竞争力差、产品销售不佳。企业为了进一步发展、解决存在的问题,请专家进行咨询,经专家的调查、研究分析后提出了企业的整改建议,首先是加强企业的管理基础工作;第二是改进产品的生产工艺技术;第三是提高产品质量;第四是降低消耗和产品成本等,为企业进一步发展指出了方向。请根据上述资料回答以下问题。

该企业发展慢、效益低是与()有直接关系。

A.管理基础工作差

B.生产工艺技术落后

C.产品质量不同

D.企业规模小

题型:问答题

阅读(共两节,15小题;每小题2分,满分30分)

第一节:阅读理解。阅读下列短文,从每题所给的四个选项中,选出最佳选项。

A

This is a true story from Guyana. One day, a boy took a piece of paper from a box. He made a paper ball and pushed it into his nose. He couldn’t get it out. He ran crying to his mother. His mother couldn’t get the paper out, either. A week later, the paper was still in the boy’s nose. His nose began to have a bad smell.

So his mother took the boy to a hospital. The doctor looked up at the child’s nose, but she couldn’t get the paper out. She said she had to cut the boy’s nose to get the paper out.

The boy’s mother came home looking sad. She didn’t want her child to have his nose cut. The next day she took the boy to her friend Sidney who lived in a house with an old lady called May. May wanted to see the child, so the child let her look up his nose.

“Yes, I can see it,” May said. “It will be out soon.”

As she spoke, she shook some black pepper on the child’s nose. The child gave a mighty sneeze and the paper flew out. His mother was surprised. May told his mother to take the boy to the seaside for a swim, for the salt water would go up his nose and stop the bad smell.

So the lucky boy didn’t have to go to the hospital to have his nose cut.

41. After the boy pushed a paper ball into his nose, ____.

A. he took it out                B. his mother took it out

C. he did nothing but cry         D. he tried to take it out but failed

42. The paper ball stayed in the boy’s nose for ____.

A. at most seven days             B. less than seven days

C. more than seven days           D. exactly seven days

43. According to the story, _____ was most worried about the boy’s accident.

A. the boy’s mother     B. Sidney       C. May       D. the doctor

44. Which of the following is TRUE?

A. The doctor helped to take the paper ball out of the boy’s nose.

B. May succeeded in taking the paper out.

C. The boy’s mother found some black pepper to solve the problem.

D. The boy had to have his nose cut at last.

45. The boy should be taken to the seaside for a swim because ____.

A. he needed to learn to swim

B. the sea water would stop the bad smell of his nose.

C. the sea water would wash out the paper ball.

D. he needed a rest

题型:问答题

中国白酒酱香型的代表是()。

A.贵州茅台

B.陕西凤酒

C.山西汾酒

D.泸州老窖

题型:问答题

转移性肝癌,CT和PET检查可显示()

A.新月形稍低密度灶

B.病变区FDG代谢减低,CT未见明显异常

C.肠壁增厚,PET示FDG代谢异常增高灶

D.颈、锁骨上窝、纵隔淋巴结肿大,PET见以上淋巴结FDG代谢异常增高灶

E.结节样占位,FDG代谢异常增高灶

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