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【单选题】
COPD患者为改善肺功能进行缩唇呼气训练时，要求蜡烛火焰距离病人口唇A.
5～10cm
B.
15～20cm
C.
25～30cm
D.
35～40cm
E.
45～50cm
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反馈参考答案：
举一反三
【单选题】An exhaustive（A级）investigation of the facts proves the contrary．
A.
exhausted
B.
tiIled
C.
thorough
D.
careful
【单选题】Mr. Green gets up early every morning, so he never ____ school late.
A.
arrives
B.
gets
C.
arrives at
D.
arrives in
【简答题】国际标准化组织提出的七层网络模型中，从高层到低层依次是什么？
【单选题】--- Mr. Green gets up very early every morning. --- Yes, so he always goes to work ___ time
A.
on
B.
at
C.
in
【单选题】— Mr. Green gets up very early every morning. — Yes, so he always goes to work ______ time .
A.
on
B.
at
C.
next
D.
this
【简答题】国际标准化组织提出的七层网络模型中,从高层到低层依次是应用层、表示层、 ( ) 、运输层、网络层、 ( ) 及物理层。
【单选题】— Mr. Green gets up very early every morning. — Yes, so he always goes to work ______ time .
A.
this
B.
next
C.
on
D.
at
【单选题】—Mr. Green gets up very early every morning. —Yes, so he always goes to work ______ time.
A.
on
B.
in
C.
next
D.
this
【单选题】—Mr. Green gets up very early every morning. —Yes, so he always goes to work ______ time.
A.
on
B.
at
C.
next
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