下面措施中，哪一种对保持生态环境最有利?

When a spider invited a fly to see buildings by _______ sea, the fly agreed immediately without _______ second thought .

阅读理解
    Hello, my name is Lina. I'm 10 years old. I'm wearing a red dress. Red is my favourite colour and dresses are my favourite clothes. I like to read books. Fish is my favourite food. Amy is my friend. She is 11 years old. She likes green and her favourite clothes are skirts. She likes to play ping­pong. She likes fish, too. But her favourite food is rice and vegetables. We like to drink juice.

执行如图所示的程序框图，若输入如下四个函数：①$f\left(x\right)=\sin x$；②$f\left(x\right)=\cos x$；③$f\left(x\right)=\frac{1}{x}$；④$f\left(x\right)=x^2$，则输出的函数是（     ）

互联网使地球缩成一张小小的网,在这张网里,你可以发布信息,阅读新闻,寻医问药,甚至在线购物交易,这说明互联网  (    )

①加强了世界各地的联系

②丰富了人们的日常生活

③改变了人们的工作方式

④推动了第二次工业革命的发展