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【单选题】
当心电图机灵敏度选择为 0.5 时,输入 2mv 的电压信号,描笔将在心电图纸上划出 J Q K Q A ________的。A.
5mm
B.
10mm
C.
15mm
D.
20mm
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举一反三
【单选题】This is _____ English class. I hope you can enjoy English. [ ]
A.
our the first
B.
the our first
C.
our first
D.
first the our
【简答题】I like English class very much．English is my ______ class．
【单选题】I even dropped my father’s cup ______ I was cooking!
A.
as soon as
B.
when
C.
after
D.
before
【单选题】I dropped my key in the garden, but luckily my mother ________it.
A.
located
B.
knew
C.
recognized
D.
spotted
【单选题】I by my teacher’s home when I was back home last night.
A.
dropped
B.
dropped on
C.
drop in
D.
dropped into
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