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【单选题】
印模材料根据后有无弹性分为弹性和非弹性印模材料，根据是否可反复使用分为可逆和不可逆印模材料，临床常用的藻酸盐印模材料特点属于A.
弹性可逆
B.
弹性不可逆
C.
非弹性可逆
D.
非弹性不可逆
E.
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【简答题】In my ( 意见,看法 ) , it is good for us to play sport.
【简答题】play sport
【单选题】The girl _____ every Sunday. [ ]
A.
play sport
B.
plays sport
C.
play sports
D.
plays sports
【简答题】It is learnt from the experiences that kids get much more than just keeping fit when they play sports. Many people think that sports will waste time, and kids will not concentrate on their studies. 小题...
【简答题】a noun that can also be used to talk about the way actors act and sportspeople play sport. ____________
【单选题】When you play sport,you need to guard________accidents.
A.
over
B.
against
C.
with
D.
at
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