题目内容
导游的步姿应给游客一种()的感觉。
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在进行自我介绍时，一定要敢于正视对方的双眼。介绍时要力求简洁，所用时间越短越好，以()分钟左右为佳。
牛顿的不朽著作《自然哲学的数学原理》出版于()年
Whether pronunciation needs special attetntion or focus in language teaching depends on many factors, especially learner factors.
Stress and intonation are as important as the sounds themselves and should be taught from the very beginning.
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