题目内容

回答（61）题查看材料

A. findings
B. locations
C. events
D. sources

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回答（58）题查看材料

A. occasionally
B. frequently
C. specially
D. recently

回答（57）题查看材料

A. when
B. what
C. how
D. which

回答（59）题查看材料

A. development
B. phenomenon
C. formation
D. composition

回答（54）题查看材料

A. durability
B. strength
C. ability
D. property