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【单选题】
具有造骨功能的细胞是A.
骨细胞
B.
成骨细胞
C.
成纤维细胞
D.
骨原细胞
E.
破骨细胞
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反馈参考答案：
举一反三
【简答题】例题2.docx 杭州西湖.docx
【简答题】词汇练习和句型结构练习
【单选题】It’s a pity that Andrew didn’t want to go to the conference.________ willing to go，we could have paid all his expenses.
A.
Had he been
B.
Being
C.
Was he
D.
He had been
【单选题】It’s a pity that he () such a good chance.
A.
missed
B.
misses
C.
had missed
D.
should miss
参考解析：
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