如图是染色体的组成示意图,请根据图示回答问题: (1)细胞的控制中心是_____

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问题:

如图是染色体的组成示意图,请根据图示回答问题:

(1)细胞的控制中心是______,其上有图中(一)的结构存在.

(2)染色体由A和B组成,其中A是______.

(3)一个A分子上有多个控制性状的______.

(4)人的受精卵内的染色体一半来自卵细胞,另一半来自______.

(5)用基因组成是Aa的水蜜桃枝条为接穗,嫁接到基因组成为aa的水蜜桃砧木上,新植株的花瓣细胞基因组成为Aa的几率是______

A.25%      B.50%       C.75%        D.100%

考点:染色体、DNA和基因的关系遗传信息在细胞核中植物的无性生殖人的性别遗传
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串联重复单位

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治疗失荣早期气郁痰结证,应首选()

A.和营散坚丸

B.柴胡清肝汤

C.桃红四物汤

D.化痰开郁方

E.二陈汤

题型:解答题

In 1977, a dead author of detective stories saved the life of a 19-month-old baby in a most unusual way. The author was Agatha Christie, one of the most successful writers of detective stories in the world.

In June 1977, a baby girl became seriously ill in Qatar, near Saudi Arabia. Doctors were unable to find out the cause of her illness with confidence, so she was sent to Hammersmith Hospital in London. She was then only semi-conscious (半清醒状态) and on the "Dangerously Ill" list. A team of doctors hurried to examine the baby only to discover that they, too, were confused by the very unusual symptoms (症状). While they were discussing the baby's case, a nurse asked to speak to them.

"Excuse me," said Nurse Marsha Maitlan, "but I think the baby is suffering from thallium poisoning. (铊中毒)"

"What makes you think that?" Dr. Brown asked. "Thallium poisoning is extremely rare."

"A few days ago, I was reading a novel called A Pale Horse by Agatha Christie," Nurse Maitlan explained. "In the book, somebody uses thallium poison, and all the symptoms are described. They're exactly the same as the baby's."

"You're very thoughtful and you may be right," another doctor said. "We'll carry out some tests and find out whether it's thallium or not."

Tests showed that the baby had indeed been poisoned by thallium, a rare metallic substance used in making special glass. Once they knew the cause of the illness, the doctors were able to give the baby the correct treatment. She soon recovered and was sent back to Qatar. Later it was reported that the poison might have come from an insecticide (杀虫剂) used in Qatar.

小题1:The one who first suggested the correct cause of the baby's illness was _____.

A.a doctor in Qatar

B.Nurse Maitlan

C.Dr. Brown

D.Agatha Christie小题2:The baby was sent to London because _____.

A.she was born there

B.the hospitals in Qatar were full at that time

C.she was the daughter of a doctor in London

D.the Qatar doctors were not sure whether they could cure her小题3:As far as we can tell from the passage, Agatha Christie _____.

A.had never met this baby

B.had spent a long time studying the baby's case

C.visited the baby in the hospital at Hammersmith

D.gave Nurse Maitlan some advice on the phone小题4:It seems likely from the passage that the baby's illness had something to do with _____.

A.a dangerous pair of glasses

B.the water in Qatar

C.a harmful substance used to kill insects

D.a dead writer小题5:When the baby was sent to the hospital in London, her case was considered to be _____.

A.an urgent one

B.quite a simple one

C.a usual one

D.the result of thallium poisoning

题型:解答题

为保证安全疏散的可靠性,洁净厂房每一生产层、每一防火分区或每一洁净区的安全出口的数量,均不应少于()。

A.1个

B.2个

C.3个

D.4个

题型:解答题

我国古代著名的军事家孙子说,“将者,智、信、仁、勇、严也”这体现了领导者素质的()特点。

A.综合性

B.层次性

C.动态性

D.天赋性

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