生物膜系统[ ] A.是生物体内全部膜结构的统称 B.是细胞内全部细胞器膜的统称

题型:选择题

问题:

生物膜系统[ ]

A.是生物体内全部膜结构的统称

B.是细胞内全部细胞器膜的统称

C.是细胞全部膜结构的统称

D.是生物体内全部细胞膜的统称

考点:生物膜系统
题型:选择题

下列表示对应化学反应的离子方程式错误的是  [ ]

A.向NH4HSO4的稀溶液中逐滴加入Ba(OH)2溶液至刚好沉淀完全:NH4+ + H+ SO42- + Ba2+ + 2OH=  NH3·H2O + BaSO4↓+ H2O

B.酸性高锰酸钾溶液与H2O2溶液混合:2MnO4-+3H2O2+6H=2Mn2++6H2O+O2

C.向碳酸氢钙溶液中滴入少量澄清石灰水:Ca2+ +HCO3+ OH-  = CaCO3↓ +H2O

D.向氨水中通入少量的二氧化硫气体:2NH3·H2O +SO2=2NH4++SO32- +H2O  

题型:选择题

第三部分 阅读理解(共15小题;每小题2分,满分30分)

阅读下列段文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。

A poor traveller stopped under the tree to eat the boiled rice and vegetables which he had brought with him. A few metres away, there was a small shop by the side of the road where a woman was frying (油炸)fish and selling it to travelers. The woman watched the poor traveler carefully, and when he finished his food and began to go, she shouted rudely, “You haven’t paid me for the fried fish!”

“But I have not had any fried fish!” he said.

“But everyone can see that you enjoyed the smell of my fried fish with your rice and vegetables,” said the woman, “If you had not smelled the fish, your meal would not have been so pleasant!”

Soon a crowd collected, and although they supported the poor traveler, they had to admit that wind was blowing from the shop to the place where he had eaten, and that it had carried the smell of the fried fish to him.

Finally, the woman took the poor traveler to a judge, who said, “The woman says that the traveler ate his meal with the smell of her fried fish. The traveler agrees that the wind was blowing from the woman’s shop to the place where he ate his rice and vegetables, and that it carried the smell of her fried fish to his nose while he was eating, so he must pay for it. What does your fried fish cost?” he asked the woman.

“Twenty-five cents a plate,” she answered, delighted.

“Then go outside together,” said the judge. “There the traveler must hold up a twenty-five-cent piece so that its shadow(影子)falls on the woman’s hand. The price of the smell of a plate of fried fish is the shadow of twenty-five cents.”

51. The traveler refused to pay the woman for the fried fish because       .

A. he was poor                                                 B. he was rude

C. he was supported by a crowd                  D. he hadn’t eaten her fried fish at all

52. Which of the following statements is true according to the passage?

A. The traveler bought the boiled rice and vegetables and ate them by the side of the road.

B. The judge had no idea what the woman meant.

C. In the fifth paragraph, the first “it” has the same meaning as the second “it”.

D. The woman got nothing but the shadow of twenty-five cents in the end.

53. The best title for the passage should be       .

A. The Smell and the Shadow

B. A Poor Traveler

C. A Rude Woman

D. A Woman and a Traveler

题型:选择题

某站某日装车18辆,卸车20辆,倒装车(一车倒一车)2辆,该站装卸作业次数应为()。

A.40次

B.41次

C.42次

D.43次

题型:选择题

下列关于危险分析的说法中,正确的是()。

A.政府级危险分析的深度应高于企业级危险分析的深度

B.企业级危险分析不应作为政府级危险分析的基础

C.有限的危险分析对政府级危险分析没有实用价值

D.政府级危险分析重点是调查面临的主要危险

题型:选择题

锌缺乏的临床表现为()。

A.严重贫血

B.味觉下降

C.发育迟缓

D.免疫力下降

E.龋齿

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