问题 单项选择题 B型题

丹毒的常见致病菌()。

A.乙型溶血性链球菌 

B.梭状芽孢杆菌 

C.金黄色葡萄球菌 

D.大肠杆菌 

E.铜绿假单胞菌

答案

参考答案:A

解析:

1.丹毒是一种累及真皮浅层淋巴管的感染,主要致病菌为A组β溶血性链球菌。 2.痈为相邻近的多个毛囊及毛囊周围急性化脓性炎症。致病菌为金黄色葡萄球菌。 3.气性坏疽的病变是由于各种气性坏疽杆菌侵入伤口后引起的广泛性的肌肉坏死的一种迅速发展的严重性感染,伴随着肌肉广泛性坏死,可有气体或无气体产生,伴随着严重的毒血症,通常发生于开放性骨折、深层肌肉广泛性挫伤,伤口内有死腔和异物存在或伴有血管损伤以及局部组织血供不良的伤病员,偶也可发生于择期手术,尤其是下肢、结肠和胆囊手术后。主要致病菌是梭状芽孢杆菌,为革兰染色阳性厌氧杆菌,有许多种,但往往以产气荚膜杆菌、恶性水肿杆菌和腐败杆菌为主,其次为产芽孢杆菌和溶组织杆菌等,通常是两种以上致病菌的混合感染。

完形填空
Steve, a twelve-year-old boy with alcoholic parents, was failing. Surprisingly, he could read, yet,    21  his reading skills, Steve had been failing since first grade. Steve was a big boy, yet, he went unnoticed...    22   Miss White.
Miss White was a smiling, beautiful, young lady. For the first time in his    23  life, Steve couldn’t take his eyes off his teacher; yet,    24  he failed. In the middle of the first term, the entire seventh grade was    25  for basic skills. Steve hurried through his tests, and    26  to dream of other things, as the day passed slowly. One day, Miss White’s    27  voice broke into his daydreams. “Steve!” Startled (吓了一跳), he    28  to look at her. “Pay attention!” She began to    29  the test results. “You all did pretty well,” she told the class, “   30  one boy, and it breaks my    31  to tell you this, but...” She hesitated, pinning Steve to his seat with a sharp    32 . “... The smartest boy in the seventh grade is failing my class!”
After that, Steve still    33  do his homework. “Just try it,” Miss White said one day. “Steve! Please! I care about you!” Wow! Suddenly, Steve got it! Someone cared about him? Someone, so beautiful and perfect, cared about him! Steve went home from school,    34 ,  that afternoon.
The following Monday he arrived at school on time, and waited for Miss White to enter the classroom. She walked in, all sparkle and smiles! Immediately, she gave a    35  on the weekend homework. Steve was the first to    36  his paper. With a look of    37 , Miss White took his paper. Steve walked back to his desk, his heart beating strongly within his chest.
Miss White’s face was in total    38 ! Suddenly, her face broke into a bright smile. The smartest boy in the seventh grade had just    39  his first test! From that moment   40  was the same for Steve.
小题1:
A.in honor ofB.in spite ofC.in addition toD.in case of
小题2:
A.toB.beforeC.untilD.upon
小题3:
A.richB.youngC.freshD.simple
小题4:
A.stillB.evenC.alsoD.forever
小题5:
A.observedB.correctedC.selectedD.tested
小题6:
A.struggledB.agreedC.continuedD.declared
小题7:
A.cheerfulB.impatientC.enthusiasticD.shy
小题8:
A.decidedB.managedC.turnedD.forgot
小题9:
A.go overB.run overC.turn overD.hand over
小题10:
A.except forB.due toC.as forD.up to
小题11:
A.willB.recordC.heartD.back
小题12:
A.painB.stareC.senseD.contrast
小题13:
A.wouldn’tB.couldn’tC.mustn’tD.shouldn’t
小题14:
A.amusedB.doubtfulC.approvedD.thoughtful
小题15:
A.surveyB.speechC.reportD.quiz
小题16:
A.give upB.hand inC.turn downD.come across
小题17:
A.respectB.curiosityC.surpriseD.fear
小题18:
A.victoryB.shockC.sadnessD.confidence
小题19:
A.escapedB.takenC.missedD.passed
小题20:
A.nothingB.somethingC.anythingD.everything
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