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问题 单项选择题 共用题干题

乳牙期及替牙期的局部障碍是形成错畸形的局部因素。

在第一恒磨牙萌出之前，多数乳磨牙缺失，迫使患儿采用前牙咀嚼时，会出现（）。

A.下颌逐渐后移

B.日久形成假性远中错

C.上前切牙前突

D.开唇露齿

E.日久形成真性下颌前突

答案

参考答案：E

阅读理解

阅读理解。

     On weekends, I often go to movies with my friend, Mike. My favorite movie star is Jack Chan. He's a

 great actor. He has a new movie, Speed. It is a very successful action movie. I think it's exciting. Mike

 likes Michele Yan best. He likes her famous movie,Sleepless Night. It's a thriller. I don't think it's great. In

  fact, it's boring. One thing is interesting. Mike also likes Beijing Opera. He often tells me,"Beijing Opera is

  really fun! My father likes it too. He even wants to be a Beijing Opera artist!"

1. _____ is my favorite star?

    A. Jack

    B. Chan

    C. Jim

    D. Jack Chan

2. Speed is _____.

    A. a comedy

    B. a thriller

    C. an action movie

    D. a comedy

3. _____ famous movie is Sleepless Night.

    A. Jack Chan's

    B. Michele Yan's

    C. Jim's

    D. Lily's

4. I think Sleepless Night is _____.

    A. great

    B. boring

    C. exciting

    D. funny

5. _____ wants to be a Beijing Opera artist.

    A. Mike's father

    B. Jack's father

    C. Jim's father  

    D. Lily's father
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单项选择题

如果某机件寿命的标刻标的是“2”时，该机件可能的寿命是多少？试从下列选项中选出不正确的选项。（）

A、70小时

B、80小时

C、90小时

D、100小时
查看答案