It can be concluded that science education has reached a new phase of development.

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问题 It can be concluded that science education has reached a new phase of development.

选项 A、grade
B、class
C、standard
D、stage

答案D

解析句意：可以概括地说，科学教育已经发展到了一个新阶段。phase意为“阶段，时期”。grade意为“等级”；class意为“阶级”；standard意为“标准”；stage意为“时期，阶段，程度”。

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