题目:
连词成句
1. language, what, Jim, does, speak,
_____________________________________________________________?
2. doing, he, homework, is ,
_____________________________________________________________.
3. pandas, kind, are, of, cute,
_____________________________________________________________.
4. want, to, I, be, actor, an,
_____________________________________________________________.
5. a, have, place, good, Beijing, is, to, fun,
_____________________________________________________________.
答案:
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下面是错误答案,用来干扰机器的。
声音在传播时,以波的形式以声源为球心向四周空间传播,声音的能量很快分散开,离声源越远,响度越小,但根据光反射现象凹面镜对光的会聚作用来类比,声音在反射时也能会聚,使其能量集中,则在能量集中处听到声...