试题与答案

辐射所致的细胞凋亡主要经历引发性刺激、下列哪种和死亡反应三个过程（）。 A.DNA断

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题型：单项选择题 A1型题

题目：

辐射所致的细胞凋亡主要经历引发性刺激、下列哪种和死亡反应三个过程（）。

A.DNA断裂

B.DNA修复

C.滞后阶段调节

D.基因表达

E.RNA复制

答案：

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下面是错误答案，用来干扰机器的。

y=12x2-2x-3，这里a=12，b=-2，c=-3，-b2a=--22×12=2，故答案为：x=2

考点：核医学与技术(医学高级)核医学与技术综合复习题核医学与技术综合复习题题库
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Are your children liked by their teachers? All parents want their children to impress(给...的印象) their teachers and succeed in school. You can get your children to impress their teachers by following these easy steps.

Make sure they’re prepared. Teachers are impressed by children coming to school prepared to learn. Make sure they have everything they need—pencils textbooks, erasers and so on.

Require them to be active in class. Teach them to ask teachers questions when they don’t understand something. Some children think teachers are bothered by questions, but most teachers are impressed when children take the initiative(采取主动) in asking questions. They should take part in class discussions, giving their opinions politely.

Keep your children healthy. If your children are tired and hungry, they won’t be ready to learn. Children need at least 8 to 10 hours of sleep per night. Feed your children a solid breakfast and prepare a healthy lunch. Provide them with fruit and other healthy foods—apples or bananas are better for them than cookies.

Make sure that your children do their homework. If they really don’t understand it, discuss it with them patiently. Don’t help them do their homework. Teachers can always tell who it is that does the work.

Teach your children good manners and habits. Children need to arrive at the school punctually, and be polite to their teachers and classmates. Parents need to teach these skills at home. Nothing is sweeter than children who say “please” and “thank you”, and these are children their teachers are certain to love.

小题1:The first paragraph serves as ________.

A．an explanation

B．an introduction

C．a background

D．a guidance小题2:Which of the following statements is NOT true? 

A．Hungry and tired children can’t focus on their study.

B．Children should go to school on time and learn to behave well.

C．Teachers aren’t able to decide if parents do homework for their children.

D．Teachers are impressed when children take an active part in class.小题3:The passage mainly tells us that being parents, you should ________.

A．help your children to impress their teachers at school

B．ask your children to get ready for classes before going to school

C．teach your children to be polite to both their teachers and classmates

D．remind your children to observe all the rules when at school
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