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46 What is the main idea of this passage?
(A)

(A)Of all the tourist attractions in Italy, the tower of Pisa is undoubtedly the most popular.
(B)

(B)The collaboration of the Italian government and people has made the tower of Pisa become famous.
(C)

(C)The best way to study Italian culture is to visit the tower of Pisa.
(D)espite the effort over the past years, the tower of Pisa still keeps tipping.

The tower of Pisa is the bell tower of the cathedral of Pisa in Tuscany, Italy.

比薩斜塔是比薩大教堂的鐘樓，位於義大利的托斯卡納。

It leans because when the building was half completed, the soil under one half of the circular structure began to subside and the tower tipped.

之所以會傾斜是因為建築物完成到一半時，圓形結構(地基)的一半土壤開始沉降，而導致塔傾斜。

Work on the tower was begun in 1173, but was discontinued for a century after the subsidence.

塔於1173年開始動工，但因地基的塌陷而停工了一個世紀。

However, in 1275, architects devised a plan to compensate for the tilt.

然而在1275年時，建築師設計了一個方法來解決傾斜的問題。

Two stories, the third and the fifth, were built out of line with the others and closer to the vertical in an effort to alter the tower’s center of gravity.
將第三跟第五的兩個樓層(stories)做更動，與其它幾個樓層的設計不同，其設計更靠近中心線，目的是為了改變塔的重心。

But the leaning has continued to increase gradually throughout the centuries.

但一個世紀以來，塔依然在傾斜。

Pumping to keep water away from the surrounding ground and the injection of cement grout into the foundations and the surrounding subsoil have been tried in recent years, but without success.

近年來嘗試了將塔周圍的水抽離，並將水泥注入地基與周圍的土穰，但始終沒有成功，

The tower, which is one of the most unusual in existence, is Romanesque in style and made of white marble.

該塔是現存最不尋常的塔之一，它是由白色大理石所建造的羅馬式建築風格。

It is cylindrical in shape and has eight stories.

它是圓柱狀的，共有八個樓層。

The tilt is about 17 feet, or more than five degrees, from the perpendicular.

它與垂直線的傾斜角度約為17英尺，或大於5度。

The tower continues to increase its tilt by about a quarter of an inch each year.

塔每年持續傾斜約四分之一英尺。

P.S.這篇文章翻譯起來語句不太順，感覺是出題老師擷取片段硬湊成一篇的.....