某细菌感染患者反复使用一种抗生素,疗效逐渐减弱,称之为()。 A.耐受性 B.耐药性

题型:单项选择题

问题:

某细菌感染患者反复使用一种抗生素,疗效逐渐减弱,称之为()。

A.耐受性

B.耐药性

C.依赖性

D.依从性

考点:执业药师继续教育执业药师继续教育题库
题型:单项选择题

如图,AD是△ABC的角平分线,AD的中垂线分别交AB、BC的延长线于点F、E

求证:(1)∠EAD=∠EDA;(2)DFAC;(3)∠EAC=∠B.

题型:单项选择题

在等差数 * * ,7,11 …中,第5项为

A.15

B.18

C.19

D.23

题型:单项选择题

下列关于启动基因的描述,哪一项是正确的()

A.开始转录生成mRNA的那段DNA顺序

B.mRNA开始被翻译的那段DNA顺序

C.RNA聚合酶最初与DNA结合的那段DNA顺序

D.阻抑蛋白结合的DNA部位

E.调节基因结合的部位

题型:单项选择题
I grew up poor-living with six brothers, three sisters and my mother. We had little money, but plenty of love and attention. I was      and energetic. I understood that no matter how poor a person was, he could still      a dream.
My dream was      . By the time I was sixteen, I could throw a ninety-mile-per- hour baseball and      anything that moved on the field. I was also      : my high school coach was John, who not only      me, but also taught me how to believe in myself. He      me the difference between having a dream and showing conviction(信念). One particular incident with coach John changed my life forever.
A friend      me for a summer job. This meant a chance for money in my pocket — money for a new bike, new clothes and the      of savings for a house for my mother. Then I realized I would have to      up summer baseball to handle the work schedule, and that meant I would have to tell John I wouldn’t be playing.
When I told John, he was as      as I expected him to be. “You have your whole life to work,”he said,“Your      days are limited. You can’t afford to waste them.”I stood before him with my head      , trying to think of the      that would explain to him why my dream of buying my mom a house and having money in my pocket was worth facing his      in me.
“Well,”he asked,“is $ 3.5 an hour the price of a dream?”
That simple question made      to me the difference between      something right now and having a goal. I      myself in sports that summer and      the year I was drafted(选拔) by the Pittsburgh Pirates to play baseball, and      a $ 20,000 contract. Later, I bought my mother the house of my dream!
小题1:
A.happyB.politeC.shyD.honest
小题2:
A.bringB.affordC.makeD.occupy
小题3:
A.athleticsB.musicC.businessD.money
小题4:
A.kickB.playC.passD.hit
小题5:
A.rightB.popularC.luckyD.confident
小题6:
A.believed inB.relied onC.called onD.dealt with
小题7:
A.gaveB.taughtC.broughtD.asked
小题8:
A.calledB.advisedC.appliedD.recommended
小题9:
A.aimB.ideaC.startD.purpose
小题10:
A.keepB.endC.giveD.pick
小题11:
A.madB.excitedC.frightenedD.shameful
小题12:
A.livingB.playingC.workingD.dreaming
小题13:
A.movingB.noddingC.shakingD.hanging
小题14:
A.questionsB.excusesC.wordsD.ways
小题15:
A.beliefB.prideC.helplessnessD.disappointment
小题16:
A.directB.clearC.straightD.bare
小题17:
A.wantingB.changingC.dreamingD.enjoying
小题18:
A.devotedB.engagedC.appliedD.contributed
小题19:
A.byB.forC.beyondD.within
小题20:
A.paidB.foundC.offeredD.presented
题型:单项选择题

某元素最高价氧化物对应水化物的分子式是H4RO4,则其氢化物的分子式是[ ]

A.RH4

B.RH3

C.H2R

D.HR

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