The air pollution in our city is getting __________.
A:bad
B:badly
C:well
D:worse and worse
近年来,南极旅游逐渐升温,据此回答问题。
放爆竹和礼花时,若你在一旁观看,最好张开嘴或捂住耳朵、闭上嘴.这种做法主要是为了( )
猜一猜,对号入座。
①Seeing is believing. ____ A. 有其父必有其子。
②A friend in need is a friend indeed. ____ B. 眼见为实。
③No pains? No gains. ____ C. 忠难见真交。
④Like father, like son. ____ D. 以牙还牙。
⑤An eye for an eye. ____ E. 不劳则无获。
河堤横断面如图所示,堤高BC=6米,迎水坡AB的坡比为1: 3 ,则AB的长为( )