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【单选题】
说明两个有关联的同类指标之比为A.
率
B.
频率
C.
比值
D.
相对比
E.
构成比
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【单选题】关于髓腔的描述下列哪项是错误的（）。
A.
青少年恒牙的髓腔比老年人大
B.
下颌第一二磨牙颊侧髓角较舌侧髓角高
C.
青少年恒牙的髓角高，制备洞型时容易穿髓
D.
老年人有时发生髓腔部分或全部钙化堵塞
E.
按牙体比例而言，乳牙髓腔较恒牙为大
【单选题】According to the passage, which of the following is true of the Rosetta stone?
A.
It was found by scholars trying to decode ancient languages.
B.
It contains two versions of hieroglyphic script.
C.
Several of its inscriptions were decoded within a few months of its discovery.
D.
Most of its inscriptions have still not been decoded.
【单选题】The plane will at three o’clock in the afternoon.
A.
take off
B.
take away
C.
take out
【单选题】The plane will take off at 6:00 pm, so I have to be at the airport 4:00 pm at the latest.
A.
after
B.
until
C.
since
D.
by
【单选题】According to the paragraph 6, which of the following is true of carotene?
A.
They can be found in green vegetables.
B.
They are found in all animal livers and dairy products.
C.
They convert into vitamin A once consumed.
D.
They are chemical substances human body needs in order to survive.
【单选题】Which of the following is NOT true according to the news?
A.
Born This Way Foundation is founded to create a kinder and braver world.
B.
People from Health and Human Services and Harvard will attend the launching.
C.
Whitney's The Bodyguard held the record with 21 weeks at Number One.
D.
The past week became the biggest sales week of Adele's 21 album.
【简答题】The plane will
in five minutes.
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