植物群落的基本特征有哪些?

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问题:

植物群落的基本特征有哪些?

考点:农学生态学生态学题库
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饮用矿泉水可分为碳酸水、硅酸水和锶水等几大类。此外还有锌、锂、溴、碘及硒等的矿泉水,这里“锌、锂、溴、碘、硒”指的是

A.元素

B.原子

C.分子

D.单质

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晴朗的天气,适宜的旅游温度是( ),会使旅游者身心舒畅,精力充沛地去旅游。

A.16℃~17℃

B.17℃~18℃

C.18℃~19℃

D.19℃~20℃

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血液能运输C0的主要原因是Hb0的解离。()

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I have recently completed my college degree. The last project was called “Smile”. The class was asked to go out to smile at three people and document their reactions(反应). I am a very friendly person and always smile at everyone and say hello anyway. So, I thought this would be a piece of cake.

My husband, the youngest son and I went out to McDonald. We were standing in line when all of a sudden everyone around us began to back away. As I turned around I smelled a horrible body odour(气味) and saw two poor homeless men standing behind me. As I looked at the short blue-eyed gentleman closest to me, he was “smiling”. The second man fumbled(摸索)with his hands as he stood behind his friend.

The young lady at the counter asked him what they wanted. He said, “Coffee is all, Miss,” because that was all they could afford.

Then I really felt it — I embraced(拥抱)the little man with the blue eyes. That is when I noticed   all eyes in the restaurant were set on me, judging my every action. I smiled and asked two more breakfast meals on and gave them to the men.

The blue-eyed gentleman looked up at me, with tears in his eyes, and said, “Thank you.”

I turned in my project. My teacher said, “Can I share this?” I slowly nodded as she got the attention of the class. She began to read and that is when I knew that we as human beings share this need to heal people and to be healed.

In my own way I had touched the people at McDonald’s and every soul that heard the story in the classroom. But, I graduated with one of the biggest lessons I would ever learn.

小题1: The underlined part “a piece of cake” in Paragraph 1 means _______.

A.easy

B.embarrassing

C.moving

D.comfortable小题2:Why did people around the author in the McDonald step back?

A.Because they were very polite to the two men.

B.Because they were moved by the two men.

C.Because the two men smelt terrible.

D.Because the two men seemed unfriendly.小题3: Why did the two men only buy coffee?

A.Because they didn’t have enough money.

B.Because they didn’t feel hungry.

C.Because they knew others would help them.

D.Because they were looked down upon.小题4:How did the teacher think of the author’s project?

A.Hard to believe.

B.Interesting to read.

C.Very puzzling.

D.Very satisfying.小题5: What did the author think she learn from the story?

A.A friend in need is a friend indeed

B.Helping others can bring pleasure to many people.

C.Nothing is difficult to a willing heart.

D.Don’t judge people according to their appearance.

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患者,33岁,男性,厌食,进行性消瘦伴右上腹疼痛1个月。肝穿刺组织病检,镜下观如图,可见何种病变()

A.假小叶形成

B.肝细胞水肿

C.碎片状坏死

D.点状坏死

E.大块坏死

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