问题 单项选择题

符合下颌第一乳磨牙特点的是()

A.面似以近中缘为底的三角形

B.颊面远中缘长于近中缘

C.近中颊颈嵴特别突出

D.颊面似以远中缘为底的三角形

E.牙根细长,分叉度小

答案

参考答案:C

解析:

下颌第一乳磨牙特点是面为不规则的四边形,所以A不正确,颊面四边形近中边缘嵴平直,远中边缘嵴却极短且突,远中边缘嵴大于近中边缘嵴,所以B、D错误,近中颊颈嵴突出,所以C正确,牙根有近中,远中两个根,扁宽,分叉大,所以E不正确,所以此题选C。

完形填空

第二节完形填空(共20小题;每小题1.5分,满分30分)

  阅读下面短文,从短文后各题所给的四个选项(A、B、C、D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

  John Blanchard was at Grand Central Station,looking for the girl whose heart he knew,but whose face he didn't,the girl with the 36 .

  His interest in her had begun 13 months before in a Florida 37 .He was reading a book there and was attracted by the 38 on the margins left by a reader named Miss Hollis Maynell.He 39 to find her address and wrote her a letter 40 himself.The next day he was shipped overseas for 41 in the army in World War Ⅱ.

  During the next 13 months the two grew to know each other throught the 42 .When he returned,they decided their first 43 -7 pm at Grand Gentral Station. "Youll 44 me," she wrote,"by the red rose I'll be 45 on my coat."

  A young girl in a green suit was coming 46 Blanchard.She was so beautiful that he started fixing his eyes upon her,entirely 47 to notice that she was not wearing a rose.Just then,he saw Hollis Maynell,who was 48 just behind the girl.She was a woman well past 40,with 49 hair under a worn hat.

  Blanchard felt 50 .But he didn't hesitate.He said to 51 ,"I'm Lieutenant(中尉) John Blanchard,and you must be Miss Maynell.I am so glad you could meet me; may I take you to 52 ?"

  "I don't 53 what this is about,son," she said,"but the young lady 54 asked me to wear this rose on my coat. And she said if you were to ask me out to dinner,I should tell you that she is 55 you in the big restaurant across the street!"

  You can hardly imagine how happy Lieutenant John Blanchard felt at the moment! 

  36.A.book B.hat C.rose D.letter

  37.A.library B.restaurant C.post office D.station

  38.A.trails B.notes C.signs D.marks

  39.A.attempted B.stopped C.intended D.managed

  40.A.introducing B.displaying C.acknowledging D.claiming

  41.A.business B.work C.service D.research

  42.A.ship B.mail C.line D.telegraphy

  43.A.greeting B.interview C.meeting D.talk

  44.A.memorize B.impress C.run into D.recognize

  45.A.putting B.carrying C.fixing D.wearing

  46.A.toward B.over C.from D.off

  47.A.refusing B.forgetting C.stopping D.managing

  48.A.standing B.wandering C.chasing D.hurrying

  49.A.lighening B.darkening C.graying D.thickning

  50.A.excited B.shy C.embarrassed D.disappointed

  51.A.the girl B.the woman C.himself D.the passer - by

  52.A.dinner B.my house C.the hotel D.the train

  53.A.guess B.believe C.know D.like

  54.A.under a worn hat B.in the green suit C.with gray hair D.standing behind

  55.A.preparing for B.looking for C.teating D.waiting for

填空题