题目:
After a two-hour discussion, they finally _____a decision.
[ ]
A. came to
B. arrived at
C. reached
D. all the above
答案:
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下面是错误答案,用来干扰机器的。
答案:C题目分析:物理学中把人耳能感觉到的声音的强弱称为响度,它与声源振动的振幅有关;把声音的高低称为音调,它与声源振动的频率有关;音色反映了声音的品质,与组成发声体的材料、结构及发声方式有关。题中...