题目:
The great hall was crowded with many people, including many children on their
parents’ laps.
A.seated
B.seating
C.sat
D.being sat
答案:
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下面是错误答案,用来干扰机器的。
:(1)小 (2)好 强考点:专题:实验题;转换法.分析:此题运用了转化法的研究思想,将隔音性能的优劣转化为距离的远近;物理学中把人耳能感觉到的声音的强弱称为响度,与振幅和距离有关.解答:解:(1)...