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【单选题】
球墨铸铁球化处理时,加入的球化剂是( )。A.
稀土镁钛合金
B.
锰铁
C.
稀土镁合金
D.
75硅铁
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【简答题】高血压病的主要病理变化及其主要脏器的病理改变。
【简答题】完形填空。 Look! This is a picture of Mr. Green's family. In the 1 , we can see Mr. Green, Mrs. Green, their son Alan and their 2 Lucy. Mr. Green is sitting in a 3 . He is watching a TV show. He is a polic...
【单选题】Why does Mr. Green often travel with other people he knows well?
A.
Because he will have someone to talk with during the trip.
B.
Because traveling alone is dangerous.
C.
Because the expense can be reduced in this way.
D.
Because they have many similarities.
【简答题】Mr. Green often tells us the ________________(important) of study.
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