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【单选题】
病变较局限的脊髓空洞症患者段性地出现A.
痛、温觉和触-压觉均受损
B.
痛、温觉受损而触-压觉保留
C.
痛觉受损而温度、触-压觉保留
D.
温度和触-压觉受损而痛觉保留
E.
触-压觉受损而痛、温觉保留
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【单选题】Fish is______and expensive at this time of the year in this area.
A.
in large measure
B.
to the minimum
C.
in short supply
D.
to the maximum
【单选题】元素周期表和元素周期律对化学学习具有指导意义，下列有关叙述正确的是( )
A.
铅位于周期表中金属与非金属元素交界处，可做半导体材料
B.
若存在简单阴离子R 2 － ，则R一定属于第ⅥA族元素
C.
S和Se属于第ⅥA族元素，H 2 S还原性比H 2 Se的强
D.
元素原子最外层电子数较少的金属一定比最外层电子数较多的金属活动性强
【单选题】The curious white lights observed on the surface of the sea in the Bermuda Triangle area______.
A.
were only seen by astronauts
B.
were unearthed by Columbus
C.
were seen from a spacecraft
D.
were not discovered for five centuries.
【单选题】Who is Calvin White? 查看材料
A.
A managerial staff of the Zoo.
B.
A journalist from National Post.
C.
A witness of the incident.
D.
A zoo animal handler.
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