如图所示，两个同名磁极间的磁感线在下列各图中正确的是：[ ]

搜题请搜索小程序“爱下问搜题”

问题选择题

答案

答案：C

题目分析：

解：

A、此图中，磁感线从N极指向N极，故错误；

B、此图中的磁感线也是从N极指向N极，故错误；

C、此图中两个都是N极，故磁感线都是出发的，故正确；

D、此图中两个都是N极，磁感线都是出发的，没有进入的，故错误。

故选：C．

阅读理解

In recent years advances in medical technology have made it possible for people to live longer than in the past．New medicines and machines are developing every day to extend life．However, some people，including some doctors，don’t agree with these life extending measures, and they say that people should have the right(权利)to die when they want．They say that the quality of life is as important as life itself，and that people should not be forced to go on living when conditions of life have become unbearable．They say that people should be allowed to die with dignity(尊严)and to decide when they want to die．Others don’t agree and say that life under any conditions is better than death and that the duty of doctors is always to extend life as long as possible．And so the quarrel goes on and on without a definite(明确的)answer．

小题1:People can live longer than in the past．It’s because _______．

A．medical technology develops

B．we have big hospitals

C．there are many good doctors

D．both B and C小题2:According to some people whether a dying patient has the right to die is up to__________.

A．the doctors

B．the surroundings

C．his or her family

D．the patient himself or herself小题3:In the writer’s opinion __________.

A．death is better than life

B．1ife is better than death

C．neither life nor death is good

D．none of the above小题4:Why do some patients want to die? Because ________.

A．the doctors are not good

B．the conditions are bad

C．life is too hard

D．they are seriously ill

查看答案

单项选择题

该患者抗生素的使用不正确的是

A．早期宜联合大量使用抗生素

B．可根据药敏试验选择敏感抗生素

C．如果骨脓肿已经被控制，仍需连续使用抗生素3周以上

D．凡出现X线片改变，均需手术治疗

E．抗生素治疗无效应该及时手术治疗

查看答案