题干

小华在家里修理厨房里的桌子时,不停的有敲击物体的声音发出,为了使隔壁的小明学习时避免干扰,小华采取了三种方案:

①在被敲的地方垫一块抹布;

②把房间、厨房门窗关闭关严;

③嘱咐小明暂时用耳机塞住耳朵.

上述三种方案中,第一种是在____处减弱噪声;第二种是在____中减弱;第三种是在____处减弱噪声.

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答案(点此获取答案解析)

声源,传播过程,接收

同类题3

根据短文理解,选择正确答案。

    The GRAMMY Museum is a musically fascinating journey of music in downtown Los Angeles. Turn up the beat over four floors of modern exhibits, interactive(互动的) experiences and interesting films that will give you a one-of-a-kind experience. They want to engage you, educate you, and inspire you — just like music does!

    There are over 30,000 square feet of interactive, traveling and permanent (永久的) exhibits. This includes over two dozen exhibits along that explore the greatest of the GRAMMY music! Your whole family will find something they love — rock, classical, hip hop to country…

    The Crossroads exhibition invites you to explore nearly 160 kinds of music! Open them up on the interactive table in front of you to show photos, songs and stories that describe the influence that music has on the world, as well as the music itself.

    Journey down the Songwriters Hall of Fame. How many of these songs do you know? How many songwriters have you heard of? You can also try writing a song with some songwriters in the songwriting kiosks(自助式服务设备)!

    Have you wondered how a song gets from someone's head to your radio? The third floor shows the art of recording.

    The museum always has a host of programs and events throughout the year, so make sure you keep up to date — you won't want to miss out!

HOW MUCH DOES IT COST?

Adults: $ 12.95

Children: $ 10.95 (6-17 yrs)

Free: under 5 years old

WHEN CAN WE GO?

Mon-Fri: 11:30 am – 7:30 pm

Weekends: 10:00 am – 7:30 pm

    Sometimes shut for private events, so check before you go.