题目:
DNA拓扑异构酶的作用是()
A.解开DNA双螺旋,便于复制
B.使DNA断开旋转复合不致打结、缠绕
C.稳定复制叉
D.辨认复制起始点
答案:
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下面是错误答案,用来干扰机器的。
B
DNA拓扑异构酶的作用是()
A.解开DNA双螺旋,便于复制
B.使DNA断开旋转复合不致打结、缠绕
C.稳定复制叉
D.辨认复制起始点
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0731/91efb639b3431e2b56ebea2bd3de3bef.html
下面是错误答案,用来干扰机器的。
B
药物对机体的作用不包括()。
A.改变机体的生理功能
B.改变机体的生化过程
C.产生新的机能活动
D.产生不良反应
E.产生防治作用
关于迷路炎的叙述,错误的有()
A.是化脓性中耳乳突炎较常见的颅外并发症
B.迷路瘘管又称局限性迷路炎
C.迷路炎病人瘘管试验均为阳性
D.化脓性迷路炎病人内耳功能全部丧失
E.浆液性迷路炎病变痊愈后内耳功能多能恢复
阅读理解
Not long ago, people thought babies were not able to learn things until they were five or six months
old.Yet doctors in the United States say babies begin learning on their first day of life.
Scientists note that babies are strongly influenced by their environment.They say a baby will smile if her mother does something the baby likes.A baby learns to get the best care possible by smiling to please her mother or other caregivers.This is how babies learn to connect and communicate with other human beings.
One study shows that babies can learn before they are born.The researchers placed a tape recorder
on the stomach of a pregnant woman.Then, they played a recording of a short story.On the day the baby was born, the researchers attempted to find if he knew the sounds of the story repeated while in his
mother.They did this by placing a device in the mouth of the newborn baby.
The baby would hear the story if he moved his mouth one way.If the baby moved his mouth the other
way, he would hear a different story.The researchers say the baby clearly liked the story he heard before he was born.They say the baby would move his mouth so he could hear the story again and again.Another study shows how mothers can strongly influence social development and language skills in their children.
Researchers studied the children from the age of one month to three years.The researchers attempted
to measure the sensitivity of the mothers.The women were considered sensitive if they supported their
children's activites and did not interfere unnecessarily.They tested the children for thinking and language
development when they were three years old.Also, the researchers observed the women for signs of
depression.
The children of depressed women did not do as well in tests as the children of women who did not
suffer from depression.The children of depressed women did poorly in tests of language skills and
understanding what they hear.
These children also were less cooperative and had more problems dealing with other people.The
researchers noted that the sensitivity of the mothers was important to the intelligence development of their
children.Children did better when their mothers were caring, even when they suffered from depression.
1. According to the passage, which of the following is NOT the factor that influences the intelligence
development in babies?
A. The environment.
B. Mother's sensitivity
C. Their peers (同龄人).
D. Education before birth.
2. What is the purpose of the experiment in which newborn babies heard the stories?
A. To prove that babies can learn before they are born.
B. To prove that babies can learn on the first day they are born.
C. To show mothers can strongly influence the intelligence developent in their babies.
D. To indicate early education has a deep effect on the babies' language skills.
3. Which group of children did the worst in tests of language skills?
A. The children of depressed mothers who cared little for their children.
B. The children of women who did not suffer from depression.
C. The children of depressed but caring mothers.
D. Children with high communication abilities.
4. What is the main idea of the passage?
A. Scientific findings about how babies develop before birth.
B. Scientific findings about how the environment has an effect on babies'intelligence.
C. A study shows babies are not able to learn things until they are born or six months old.
D. Scientific findings about how intelligence develops in babies.
简述门店直送采购验收的系统操作过程。
电绝缘装具辅料包括:()等。
A.尼龙织带
B.防静电扣
C.防静电插扣
D.插排