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第1题

Original and good research, especially in science, economics and social sciences, has a trickle-down effect on society.
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第2题

同步带传动是靠带齿与轮齿间的（ ）来传递运动和动力的 A.摩擦力 B.压紧力 C.啮合力 D.楔紧力
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第3题

Just like in other careers, educators should receive ample opportunities for professional development.
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第4题

Educators need proper teaching resources in order for students to achieve.
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