减速起动机起动系统除（）和直流电动机磁极之外，其他零部件的结构原理与电磁式起动机起动

下图表示大兴安岭某一森林生态系统中红松的种群密度变化的示意图。据图回答问题。

(1)图中A→B的种群密度变化率为_______[株/(百平方米·年)](以“+”代表增加，以“-”代表减少)，计算过程是____；依此变化率估计到1995年，红松的种群密度将是______株／百平方米。

(2)图中哪一时间阶段内种群的变化最大__________。

A．A→B    B．A→C    C．B→C    D．无明显差别

(3)影响种群密度的因素有(多选)____________。

A．空间    B．营养    C．迁移    D．季节变化    E．人为改变环境

Napoleon Bonaparte died on May 5, 1821, on the island of St. Helena off the coast of Africa. He was 51 years old at the time. When doctors examined Napoleon’s body, they said that the former emperor of France had died from cancer of the stomach. That was the cause of death recorded in the official report. However, other doctors disagreed. One doctor who was present during the examination of the body said that Napoleon died of hepatitis. Other historians and medical experts have suggested that Napoleon died of syphilis, tuberculosis, or perhaps malaria. Now, after careful research, a British chemist thinks that Napoleon might have been poisoned -- not by a person, but by his wallpaper.

Napoleon was sent to the island of St. Helena in 1815 after he lost the battle of Waterloo. He was a prisoner on the island. Although he had servants to attend to him, he had to live in one small building. St. Helena is a very wet island, so the walls of the building were always covered with mold. Napoleon became ill from spending too much time inside his house. Almost constantly he had a fever, chills, and felt sick to his stomach. He often felt pain in his shoulders and in his side. His skin turned yellow. He got frequent headaches, and he would become dizzy and vomit(吐). None of the medicine that the doctors gave Napoleon seemed to help. They were not sure what was the matter. Finally, Napoleon was too weak to leave the house. One night, while he was sleeping, he went into a coma and died.

Many doctors who later reviewed the reports of Napoleon’s illness found that the symptoms(症状) did not show a man who suffered from stomach cancer. It seemed obvious that Napoleon had died from some other cause. In 1961, a Swedish doctor examined some of Napoleon’s hair and found a high level of arsenic, a chemical poison. Was Napoleon murdered? It is doubtful. Arsenic was used in many types of medicine during Napoleon’s time, so he might have taken the arsenic as a cure for his illness. Then, in 1982, Dr. David Jones from England began to look into the mystery and suggested that Napoleon might have breathed in arsenic which was in the air of his house. In the 1700s and 1800s, arsenic was used to make a kind of green paint used on cloth and wallpaper. If the paint was used on a wet wall, the arsenic would go into the air. A person in the room might breathe that air. After studying the wallpaper in the room where Napoleon died, Dr. Jones found high levels of arsenic in the green paint on the walls.

小题1:Why did Napoleon live on St. Helena?

A．He owned the island.

B．He was a prisoner there.

C．His family lived there.

D．He liked the island.小题2:The official report said that Napoleon died of____________.

A．cancer

B．a coma

C． mold

D．poison小题3:Napoleon suffered from the following symptoms except __________.

A. chills      B. fever      C  dizziness     D. bleeding

小题4:According to Dr. Jones, how did the arsenic probably get into Napoleon’s body?

A．He drank it..

B．He touched it.

C．He breathed it in.

D．He ate it小题5:The passage says that                      .

A．a British doctor thinks he has found the cause of Napoleon’s death

B．many doctors have tried to guess the cause of Napoleon's death

C．Napoleon could have died from poison

D．all of the above

有关子宫内膜异位症的叙述，正确的是()

A．子宫内膜组织生长在子宫以外，称子宫内膜异位症

B．有遗传性

C．多发生于25岁～45岁的妇女

D．绝经后异位内膜可萎缩

E．用药物抑制排卵，可缓解疼痛

典型肝脓肿壁出现三层环状结构，腔内可有分隔，增强扫描时强化最明显的是（）。

A.水肿带

B.炎性坏死组织

C.纤维肉芽组织

D.脓肿内分隔

E.以上都不是

基托内出现圆形大气泡的原因是（）

A.塑料充填不足

B.塑料充填过多

C.热处理时升温过快

D.热处理时间过长

E.热处理温度不够