问题 单项选择题

一项吸烟与肺癌关系的病例对照研究结果显示:χ2=12.36,P<0.05,OR=3.3,正确的结论为

A.病例组肺癌的发病率明显大于对照组

B.病例组肺癌的患病率明显大于对照组

C.吸烟和肺癌发病之间存在明显剂量反应关系

D.不吸烟者发生肺癌的可能性明显小于吸烟者

E.对照组发生肺癌的可能性明显大于病例组

答案

参考答案:B

解析:P<0.05,说明有差别,OR=3.3,相对危险度,说明病例组肺癌的患病率明显大于对照组。

完形填空
Thomas Edison tried two thousand different materials to make the light bulb. When none worked successfully, his assistant __16_, “All our work is in vain. We have learned nothing.”
Thomas Edison replied very __17_, “Oh, we have come a long way and we have _18__ a lot. We now know that there are two thousand materials which we cannot _19__ to make a good light bulb.”
If you learn from your mistakes, then you are _20__. If you learn from someone else’s mistakes, then you are a genius. Success is nothing more than a few simple disciplines __21__ daily and failure is nothing more than a few small __22_ repeated daily.
How __23_ the above lines are! Success takes __24_. We’ll make mistakes _25__ we do things in too much of a hurry. When we do not practice disciplines in life, we don’t build enough confidence to __26__ new and challenging tasks which are important and matter in life. Our confidence __27__ what we think of ourselves and whether we believe in ourselves. We are all born with exceptional _28__, but only a few really _29___ their true potentials and make efforts in life and the others just lead a(n) _30__ life. Do you want to be exceptional?
Success is a fruit which everyone wants to _31__, but it is not found everywhere and no one can __32_ it without serious efforts.
Those who want to succeed will find a way; those who don’t will find a(n) _33__!
Success depends on previous __34__, and without it we will end in failure.
When you are __35__, please enjoy it and give your hand to others who want to accomplish something.                  
小题1:
A.celebratedB.complainedC.explainedD.answered
小题2:
A.confidentlyB.madlyC.carelesslyD.angrily
小题3:
A.rememberedB.refusedC.learnedD.ordered
小题4:
A.testB.ignoreC.inventD.use
小题5:
A.healthy B.enthusiasticC.intelligentD.generous
小题6:
A.shownB.preventedC.recordedD.practiced
小题7:
A.errorsB.machinesC.jobsD.steps
小题8:
A.commonB.strangeC.familiarD.true
小题9:
A.effectB.timeC.drugsD.roles
小题10:
A.as thoughB.so thatC.unlessD.if
小题11:
A.keepB.attemptC.giveD.see
小题12:
A.depends onB.sets asideC.turns downD.sets up
小题13:
A.appearanceB.experiencesC.qualitiesD.feelings
小题14:
A.ownB.realizeC.provideD.research
小题15:
A.activeB.hardC.richD.average
小题16:
A.sellB.drawC.eatD.praise
小题17:
A.achieveB.watchC.offerD.recognize
小题18:
A.storyB.excuseC.keyD.plan
小题19:
A.preparationB.influenceC.lifeD.generation
小题20:
A.powerfulB.wonderfulC.successfulD.hopeful
选择题