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【单选题】
在心电图上观察到QRS波群提前出现,形态宽大畸形,其前无相关的P波为A.
室性期前收缩
B.
房性期前收缩
C.
交界区性期前收缩
D.
心房颤动
E.
阵发性心动过速
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举一反三
【单选题】The static interference on the radio __________ an airplane. was caused by was causing has caused caused by
A.
was caused by
B.
was causing
C.
has caused
D.
caused by
【单选题】坡道“类型属性”中有一个“坡道最大坡度(1/X)”参数,表明最大坡度限制数值为
A.
坡面垂直高度 / 坡面长度
B.
坡面水平高度 / 坡面长度
C.
坡面垂直高度 / 水平宽度
D.
坡面水平高度 / 垂直宽度
【单选题】坡道“类型属性”中有一个“坡道最大坡度(1/x)”参数,表明最大坡度限制数值为( )
A.
坡面垂直高度/坡面长度
B.
坡面水平高度/坡面长度
C.
坡面垂直高度/水平宽度
D.
坡面水平高度/垂直宽度
【单选题】The earthquake left,______ a lot of damage to Wenchuan.
A.
caused
B.
to have caused C to cause D. having caused
【简答题】A．being caused B．caused C．to be caused D．having caused
【单选题】The static interference on the radio __________ an airplane. has caused caused by
A.
was caused
B.
by was causing
C.
has caused
D.
caused by
【单选题】The storm left, _____ a lot of damage to this area. [ ]
A.
caused
B.
to have caused
C.
to cause
D.
having caused
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