阅读如图所示的程序框图，运行相应的程序，若输入m=42,n=30，则输出的值为(      )

为了减小高速行驶的车辆产生的噪声对高速公路两侧居民的干扰，通常在高速公路两侧立有一定高度的隔音板．立隔音板是为了（   ）

下列有关比例尺的说法正确的是（    ）

    For me, living in Canada for 25 years, China is a new world that I have longed to explore. This spring, I c____ Yangzhou to be my first stop on a 16-month trip around China. It was like love at first sight. At 15, I bought a book of collection of p____about Tang Dynasty. Through it, I heard of Yangzhou for the first time. I was deeply attracted by a poem written by Li Bai – “Sailing to Yangzhou in M____ .

    Yangzhou has always been famous for its gardens. A____them, the Slender West Lake, one of the b____attractions in the city, was my first stop. The park with its fantastic landscape and lots of history has enough to keep a t____busy for the whole day. What a shame I simply could a____half a day!

    My next stop was He Garden, one of the best protected gardens in Yangzhou. It was once owned by the family of He Zhidao in Qing Dynasty. He Zhidao successfully brought Chinese and W____architectural(建筑的) features together.

    Yangzhou is also the starting point of the Grand Canal tour. Taking a boat along the part of the canal in Yangzhou, I was amazed at the liveliness of this ancient waterway and the c____history and culture.

    Luckily, my two-day trip to Yangzhou was filled with p____and wonder. It made me hungry for more China.