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【单选题】
,男,35岁,口腔卫生良好,无龋齿及牙周疾患。第一磨牙中性关系, 上颌可用间隙92mm,必需间隙95mm,下颌牙列,余正常。 正确的诊断是A.
Ⅰ类错牙合，Ⅰ类1分类
B.
Ⅰ类错牙合，Ⅰ类2分类
C.
Ⅰ类错牙合，Ⅴ类
D.
Ⅰ类错牙合，Ⅵ类
E.
正常牙合
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举一反三
【单选题】If you really have to leave during the meeting, you’d better leave _________ the back door.
A.
for
B.
by
C.
across
D.
out
【单选题】---- May we leave the classroom now? ---- No, you _____. You _____ to leave until the bell rings.
A.
mustn’t, are allowed
B.
can’t, aren’t supposed
C.
don’t have to, are supposed
D.
needn’t, aren’t allowed
【单选题】Do remember to __________the lights before you leave. If you leave them _______, the boss will be angry with you. [ ]
A.
turn on, on
B.
turn down, off
C.
turn off, off
D.
turn off, on
【单选题】— Can I leave this door open at night? — You _______ better not.
A.
should
B.
would
C.
could
D.
had
【单选题】--- May we leave the classroom now? --- No, you ____________ . You ____________ to leave before the bell rings.
A.
mustn’t, are allowed
B.
don’t have to, are allowed
C.
needn’t, aren’t allowed
D.
can’t, aren’t allowed
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