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【简答题】
为什么要在X射线管出口处放置一定均匀厚度的进行滤过? 2、滤过的单位是什么? 3、什么是X射线的质?X射线的质与什么有
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举一反三
【单选题】Most of my classmates don't like to talk with their parents, but I am _____ them. I love to talk with my parents. [ ]
A.
the same as
B.
different from
C.
pleased with
D.
good fo
【单选题】— My parents and I are _______ Dalian next week. — Have a good trip! [ ]
A.
waiting for
B.
leaving for
C.
looking for
【单选题】It’s very nice __________ you __________ my parents your best wishes.
A.
of; sending
B.
of; to send
C.
for; to send
D.
for; sending
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