坦桑石属()。
A.一轴晶正光性
B.一轴晶负光性
C.二轴晶正光性
D.二轴晶负光性
参考答案:C
The lift yesterday. We’ll have to walk up to the eighth floor this evening.
A.broke down
B.took down
C.came down
D.got down
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