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【多选题】
关于X射线的特点，下面说法正确的是;A.
不可见的
B.
能量很高
C.
穿透能力强
D.
具有杀伤力
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反馈参考答案：
举一反三
【单选题】They won the , _______ made their team leader proud of them.
A.
that
B.
which
C.
it
D.
all this
【简答题】根据渥太华会议的共识,我国将 作为国内旅游统计系统的基础概念。
【简答题】They won the with _____.
【简答题】接触网临时停电或异常时，要迅速断开主断路器、降下受电弓，立即采取 ， 检查弓网状态。A. 停车措施
【单选题】Susan decided not to write her resignation in the office because she didnt want her colleagues to know what she ______.
A.
has done
B.
had done
C.
was doing
D.
is doing
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