氧增强比(OER)指的是()。 A.X线和γ线照射剂量之比 B.给氧后肿瘤放射疗效增

题型:单项选择题 A1/A2型题

问题:

氧增强比(OER)指的是()。

A.X线和γ线照射剂量之比

B.给氧后肿瘤放射疗效增加的比例

C.在有氧和无氧条件下达到同样的生物效应所需要的照射剂量比

D.无氧条件下肿瘤的放射效应的改变

E.有氧和无氧条件下敏感性之比

考点:肿瘤外科主治医师肿瘤的治疗肿瘤的治疗题库
题型:单项选择题 A1/A2型题

以下选项中说法错误的是()

A.前牙接触区靠近切缘部位

B.前牙接触区的唇舌径大于切颈径

C.前磨牙及第一磨牙近中接触区在邻面近1/3偏颊侧

D.第一磨牙远中与第二磨牙的接触区在邻面1/3的中1/3附近

E.后牙接触区的颊舌径大于颈径

题型:单项选择题 A1/A2型题
修一条公路,第一天修了全长的
1
5
,第二天修了全长的
1
6
,第三天修了全长的
1
4
,还剩多少没有修?
题型:单项选择题 A1/A2型题

It is difficult for parents of nearly every family to teach their children to be responsible for housework, but with one of the following suggestions, you really can get your children to help at home.

If you give your children the impression that they_____________________, then they will regard themselves as unfit or unable persons. Unless children believe they can succeed, they will never become totally independent (独立).     

My daughter Carla’s fifth-grade teacher made every child in her class feel special. When students received less than a perfect test score, she would point out what they had mastered and declared firmly they could learn what they had missed.

You can use the same technique when you evaluate (评价)your child’s work at home. Don’t always scold and give lots of praise instead. Talk about what he has done right, not about what he hasn’t done. If your child completes a difficult task, reward him with a Sunday trip or a ball game with Dad.

Learning is a process (过程)of trying and failing and trying and succeeding. If you teach your children not to fear a mistake of failure, they will learn faster and achieve success at last.

1.What’s the best title of the passage?    

2.Which sentence in the passage is the closest in meaning to the following one?

The process of learning is full of trying and failing ,and after trying again and again ,one will succeed.

3.Please fill in the blank in the passage with proper words or phrases to complete the sentence.(within ten words)

4.What do you think parents should do to educate their children well according to the passage?(within 30 words)     

5.Translate the underlined sentence into Chinese.

题型:单项选择题 A1/A2型题

在中国近代史上,中国人民对外来侵略进行了英勇顽强的反抗,但都是以中国的失败,中国政府被迫签订丧权辱国条约而告终。从中国内部分析,其根本原因是( )。

A.军事战略的错误
B.社会制度的腐败
C.经济技术的落后
D.思想观念的保守

题型:单项选择题 A1/A2型题

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