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【简答题】
当 X 射线管的管电压为 150KV 时 , 产生的 X 射线的最短波长为多少 ? 假如连续 X 射线最大强度所对应的波长为最短的波长的 1.5 倍 , 求最大强度处的光子能量为多少 ?
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A.
in turn
B.
in return
C.
by chance
D.
by turns
【单选题】It is easy for people to ______ the bad habits such as smoking and drinking, which are not so easy to get rid of. [ ]
A.
look into
B.
slide into
C.
break into
D.
knock into
【单选题】Stressful environment leads to unhealthy behaviors such as Ix)or eating habits, which ______ increase the risk of high blood pressure and heart disease.
A.
in turn
B.
by chance
C.
by fortune
D.
in case
【单选题】Stressful environment leads to unhealthy behaviors such as poor eating habits, which ______ increase the risk of high blood pressure and heart disease.
A.
in turn
B.
by chance
C.
by fortune
D.
in case
【单选题】Stressful environments lead to unhealthy behaviors such as poor eating habits, which _________ increase the risk of heart disease.
A.
by chance
B.
in return
C.
in turn
D.
in a row
【单选题】Stressful environments lead to unhealthy such as poor eating habits, which ________ increase the risk of heart disease.
A.
in turn
B.
in return
C.
by chance
D.
by turns
【单选题】Stressful environment leads to unhealthy behaviors such as poor eating habits, which _____ increase the risk of heart disease.
A.
by chance
B.
in other words
C.
in return
D.
in turn
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