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【单选题】
硬质合金刀具热效应磨损的主要原因是( )A.
相变磨损和扩散磨损
B.
氧化磨损和相变磨损
C.
氧化磨损和扩散磨损
D.
相变磨损和粘结磨损
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知识点：
皮皮学刷刷变学霸
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【简答题】LTE-3G相对于LTE,多了哪个单元____
【单选题】The little elephant is afraid to go alone. He always walks _______ his mother. [ ]
A.
besides
B.
beside
C.
below
D.
under
【单选题】We all went to the zoo yesterday ____Jack. His mother was ill and he had to look after her at home .
A.
except for
B.
besides
C.
beside
D.
except
【简答题】听下面一段材料，回答第1-4题。 1. How was the man going to give his mother flowers? A. To send them to her by himself. B. To order them in the flower shop. C. To post them by post office. 2. How much did the young ...
【单选题】The little elephant is afraid to go alone.He always walks ______ his mother.
A.
below
B.
besides
C.
beside
D.
under
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